Yes!
I have iphone X running on ios 14.2. Since the day I’ve updated it to ios 14.2, I’ve been experiencing the wifi issue.
when I go to wifi then it only shows 2.4 GHz and sometimes it only shows 5 GHz and sometimes nothing at all.
moreover, after connecting the wifi to 2.4 GHz (since this one shows up the most), the iphone comes back to cellular data just under a minute.
Apple should look into this and should fix it in the next update asap.