It's been previously reported, you missed the evidence you say doesn't exist (you frame your ignorance as knowledge of absence)

>Apple is only planning to implement sideloading support in Europe.

See also the language about this being the start of a rollout of sideloading in other reports - ie EU only. This will be driven by courts, Apple hasn't and won't be charitable. Apple spins every incremental change as a positive win to cover PR instead of admitting partial defeat.

Btw Apple already today restricts loads of services and content based on region, you should look into that if you think that's a challenge for them