This issue is going on for 2 months. Please send feedback through system>settings>feedback. They get the logs in that case which may help them solve the problem faster.
I was hoping the Community moderators would have flagged the constant 5g complaints from users to the Nothing devs by now, but that doesn’t seem to be the case. It looks very bad when users have to face network issues for 2months till now.
I hope they provide a fix soon.