Hey there! That is a wonderful question, and we're happy to have the honor of answering that for you!
To best put it, if you have any games that are cross-buy, you can just head over to the store and hit download to get those on your Quest 2!
If a game you purchased doesn't seem to be in the cross-buy section, you won't be able to download those on your Quest 2 if it isn't supported.
If you have any issues or other questions, please don't hesitate to reach back out anytime!