Cant play with friend

Hello, I play Minecraft Bedrock on PlayStation 5.

I cannot buy a Realm, I cannot join my friend's Realm, and I also cannot join my friend's normal world. Invitations do not load and I cannot connect to anyone.

I already tried:
• Restarting PS5
• Restarting internet router
• Logging out and back into my Microsoft account
• Reinstalling Minecraft
• Checking PlayStation Plus

But nothing works.

My details:
• Platform: PlayStation 5
• Minecraft version: Bedrock (latest update)
• Region: Czech Republic
• Microsoft account is linked to PSN

Please help me fix this problem.

Thank you.