PS5 Friendship Deals and Requests for PC

I’d really like to understand why I simply can’t trade or send friend requests to players on PC. I’m currently playing on a PS5, and all my friends are on PC, but I can’t trade with them or add them as friends.

Honestly, I truly hope this is just a bug. It’s hard to believe they intentionally added a restriction to separate players by platform. It’s already frustrating enough that PC currencies and outfits don’t work on PS5. It’s difficult to understand what the company’s goal is with this. To profit twice from the same account?