New PS5 release completely broke multiplayer?? Please help revert world to ps4 version!

So currently I play on PC bedrock with a friend who has a world on PS5. He used PS4 version for the longest time with ZERO issues like this. As soon as he updated to PS5 release a few days ago and transferred his world we started having connection problems. At first it was just super laggy like waiting 20 seconds to pick up an item or load a chunk, or open my own inventory, but now I can’t even connect at all. He sends invites and it just keeps saying unable to connect to world. We’ve tried for days in a row now. Is there any fix to this? He refuses to pay for a realm which I understand, but is there any alternative to getting the world with its current progress back on the ps4 version??