I would not be surprised if the exact demands towards the regulation was unclear and lawyers included PWAs just to be sure. Removing them so publicly might have been a way to get the regulators to say “we don’t consider PWAs as part of the browser” or “we give you a longer deadline”.
Testing out the edges of regulation is a weird fascination for me, so I would have loved to be in the room 😅
Apple Reverses Course on PWAs in EU https://512pixels.net/2024/03/apple-reverses-course-on-pwas-in-eu/