Both steam and roblox are saying i don’t have connection even though I do.

What I've tried:

Granting firewall permissions

Turing off fire wall

Reset my computer like 50 times

Flushing dns

Changing dns

Syncing time

Changing internet adapters like twice

And for some reason the problem goes on and off, like sometimes it connects other times it doesnt, and sometimes it disconnects while I'm playing roblox and won't reconnect.

I've tried reinstalling roblox and resetting my router but its only temporary.

One time, I was playing roblox, shut my pc down, came back like 2 minutes later and it won't reconnect.