The Federal Regional Court of the 1st Region (TRF-1) has overturned a trial ruling and reinstated an injunction imposed by the Administrative Council for Economic Defense (Cade) on Apple, as part of an investigation into alleged abuse of dominant position in the app distribution market for iOS devices. According to the ruling, the company will have 90 days to implement the changes mandated by the antitrust authority.
Technically, sideloading is possible already, but you need a developer account, you’re limited to 3 sideloaded apps at a time, and you have to renew them every week.
So the more difficult way already exists.