This will be adventure modules and other official content to be purchased. Hopefully with all the bells and whistles you can have in Foundry.
Not sure if there is a big market, as most foundry users are comfortable putting the scenes together already.
There are a ton of Facebook groups too for finding online games. Although most use discord rather than zoom/Google meet. I run games on Discord using various vtts such as foundry and tabletop simulator. There's a lot to pick from.