Ps5 to PC cross play

Here's context:

Literally crashing out, I've been tryna connect with my sister for the past hour, I'm on ps5 and I was playing with my other sister just before and she's also on ps5. Anyways she had to go so I wanted to play with my PC sister.

Hell. Trying to figure out how to invite her is literally making me cry.

I already played a multiplayer game with both my sisters and it works fine but now I need help for a fight so I want her to join my main world and it's not working.

Here's the issue:

Basically on main menu it says that I'm logged in Larian and Mod.io. When I click on Larian I have to log back in each time. When I go into my world and in options the cross play bottom is greyed off so I can't modify it but it does say on. I can't invite her or anything only my ps5 friend list appears. It I try to invite her from the "press square for friends" thing it doesn't work.

I did some research and apparently for some ppl creating a new game and then inviting from there works but when I sent the invite it said like issue or smt and then she said she didn't get the invite even though it said invite sent.

I gave up I literally gave up, not only on my fight but on my will to play altogether right now.

Please help if you know any way too and lmk if you got any other questions.

And yes I disconnected, reconnected, closed the game, all that Jazz....