Gaming

My somewhat controversial suggestion is outward. Low graphical intensity PC game, very open world, and some incredibly unique and polarizing design choices. If your favorite part of breath of the wild was world exploration and korok finding, you may love it! If you like quality of life features though, maybe not.

Things like, you have a world map but no "you are here" marker so need to place yourself with landmarks. You need to drop your backpack to fight effectively and remember where you dropped it, the magic system is based on insomnia with the longer since you slept the more mana you have until you push it too far and just collapse. Really really weird game that I still think about all the time years later.

You might really enjoy DayZ. The public servers are pretty brutal, but if you find a comfortable RP server you can settle in and really enjoy exploring the landscape. Once you're used to the mechanics it's so smooth.

Stereo headphones or even like monitors make hunting a lot of fun, listening to distant sounds trying to find a deer or boar is a lot of fun. And once you're used to dealing with zombies and the sthough.l mechanics, crafting and all that, it really opens up.

Plus the ability to expand it with modding is pretty extensive. We've got some neat stuff on our own server (though not much pop atm), and I've seen others that do some next level stuff like player vampires and werewolves and stuff.

Even just the vanilla game is absolutely gorgeous though. If you like exploring, scavenging, and crafting, especially with friends, it's kind of perfect.

Conan Exiles has a somewhat similar vibe but a bit clunkier and in a low fantasy setting. It's also got a lot of D&D roleplay servers.

Perhaps you may or may not enjoy ~~Space Asshole~~ Red Faction: Guerilla. It's a 2009 game that got a solid enough PC port that may run on weaker systems. There's a remastered version but if you're aiming for low-spec the original might be a better bet.

Anyway, it's an open world set on Mars and you go around wreaking havoc and blowing up buildings with ahead-of-its-time physics/destruction mechanics. The combat is more like a shooter and you play with lots of explosives. It's not a huge map by standards today but is a big enough playground to keep one occupied.

I just finished playing Horizon: Zero Dawn for the second time and it was way more engaging than I remember it being back in 2017. Apparently a lot of reviews ragged on it for “not being Breath of the Wild” which is a lame thing to complain about, even if the game came out at the same time, and they share a lot of thematic elements (like heavily focusing on archery, fighting ancient machines, exploring a beautiful world, etc.).

But it’s a very different game, very narrative heavy, very beautiful, and very well-optimized on PC. The combat is very focused and fun in a good way.

On the switch you have Skyrim (but I'm assuming you've played that)

But also there's a couple games that could be worth looking into. I have no idea how well they play on the switch or if they would even be your cup of tea, but there's Dragons Dogma(the first one) and also Outward. Again no idea how they play on switch but they're both open world rpg type games.

If you're up for something that is specifically all about exploring, you could try Outer wilds on the switch(this does not have combat FYI) but you get to explore a solar system and unravel a mystery.

Baldur's Gate 3 isn't exactly open world in the strictest sense, but the maps are so massive that you can get the same sense of wonder and exploration as something like Skyrim or BoTW.

Not precisely open world but has the same feeling of exploration, discovery and unlocking, Supraland. Harder puzzles, unlock things that make combat easier. Combat is pretty similar to botw.

Noita is on sale!

I don't know how weak you're talking, but Horizon Zero Dawn has that same engaging, high skill ceiling combat that BOTW/TOTK does. The minimum specs don't look too bad, and the game is quite well optimised. Forbidden West is probably a no-go, though, and it's a much better game which serves as a true direct sequel. They're great if you like story, too.

The Zero Dawn Steam page.

As well as Forbidden West.

Everyone else has already made great suggestions too. This was the only different suggestion I could make.

Others have mentioned Elder Scrolls, but nobody recommended Daggerfall yet, so it's one of my picks. Yes, the 1996 game, which you can play on Unity for a much, much better experience overall. Since the game is free, you don't need to pay a thing. Combat won't feel good, tho.

If you enjoy space games, X3 Albion Prelude might be a good option. It's "open world" in that you can go anywhere right from the start, but the main gist of the game is to get rich so you can get the capital ships. Ship to ship combat is fine, each ship class has strengths and weaknesses. It has a learning curve and can feel needlessly convoluted at times

Kingdoms of Amalur isn't really open world, but its combat is awesome. Get the original, non-remastered version, and it should run on your stronger PC, hopefully.

It's not Zelda like, but if you like factory games, Satisfactory is as close to open world as a factory game gets. You land on a planet and have to build a factory to launch things into space for corporate overlords. It's first person, lots of climbing and building. There's a tiny bit of combat, not the focus tho.