Cannot connect to wifi after updated to ios 15.3.1

To whom it may concern,

My iPhone is the only phone could not connect to wifi at our house after updated to ios 15.3.1. 

I have tried to restart wireless router many times, re-setting my iPhone but it seems not work. 

At the mean time, I have to use cellular connection at home if I want to browse webs and it is very very very inconvenient! 

Could you please advise me how to fix this issue?

Thank you very much!