Here's a quick fix to try and play with friends cross platform in Helldivers 2 if the friend request action isn't working across PS5 and PC.

We explain how to add friends in Monster Hunter Wilds and how friend requests work in this guide.

Helldivers 2 crossplay friend requests bug workaround If you still can’t accept friend requests after following the steps above, there is a simple solution for playing with your friends.