>"unless necessary for the security or functioning of the covered platform," from https://www.congress.gov/bill/117th-congress/senate-bill/299...
I think it would actually be very good for the app store, outlawing a lot of the restriction that Apple places on things like payments.
I really don't know what to think about the bill overall. It would definitely have the largest impact on Amazon, their basics line would pretty much be killed by the law. Google rankings would also be overhauled, no more flights at the top of the page.
The testimony in support of the bill by Sonos [0] and Tile [1] is also a good read.
[0] https://www.judiciary.senate.gov/imo/media/doc/Eddie%20Lazar...
[1] https://www.judiciary.senate.gov/imo/media/doc/04.21.21%20Ki...