This WIFI issue has happened to me about every 6 weeks since I purchased my 21 Laramie in March '21.
It always seemed to happen on a road trip when I needed it the most for the kids.
In my experience the best resolution was to pull fuse F44 (i think) under the steering column for a second or two and re insert it.
Once it reboots itself the WIFI will work immediately, however the display theme will reset and the climate control needs 15 minutes or so to reinitialize.
You will not lose any other settings.
A few months ago I installed a momentary switch under the dash in line with the fuse to F44.
Now I can easily reach the reset button and conveniently restore the WIFI while driving.
I needed it on a road trip last month and it worked like a charm.
Here's the switch and fuse tap I used.