REPLACEMENT ROUTER SOLVED MY PROBLEM (BUT APPLE STILL NEEDS TO UPDATE FIRMWARE)
I had a similar problem with my new Mac Mini M2 as others on this thread. The new Mac could not connect to my Wifi even though every other device we have connected without a problem. One of these other devices is a Macbook Air M2 running Monterey.
We have fibre optic service with 500mb/s coming through a 5-year-old Bell Home Hub 3000 router (I am in Canada). The new Mac Mini could connect via Wifi to the router but could NOT get an IP address. The error messages were either no IP address or a self-assigned IP address. Either way, it could not reach the Internet. Connecting via ethernet cable worked perfectly.
High level customer support from both Bell and Apple kept bouncing me back and forth for days, tweaking settings and blaming each other. We tried everything, including reinstalling Ventura. No one suggested disabling AWDL, but I wouldn't want to give up that functionality anyway.
Eventually, a high level tech support guy at Bell recommended separating the signal into two separate SSIDs--one for 2.4 and the other for 5ghz. (He might have been reading this thread.) The Mac Mini connected without any problem to the 2.4ghz SSID but behaved exactly the same way with the 5ghz SSID. This was enough to convince him that it is an Apple firmware issue.
But here's an interesting twist: I took the Mac Mini to other locations, including an Apple store, had no problems connecting to other Wifi networks. One of these other networks I tried definitely had an SSID that combined 2.4ghz and 5ghz, and the Mac connected to the 5ghz band without any trouble. For whatever reason, it was only my router that created probelms for the Mac Mini.
On a whim, and out of desperation, I called a Bell store and asked if I can swap out my router for a different Home Hub 3000. Right away they said yes. Apparently, it was in my contract all along that I could just bring in my router and exchange it for a different one anytime, no questions asked. It is insane that not one single Bell tech support person told me I could try this as part of the troubleshooting process. In fact, some of them told me that I could NOT get a replacement.
The replacement Home Hub 3000 worked perfectly and immediately. The Mac Mini connects right away to 5ghz. If anyone else out there is experiencing a similar problem, be sure to try swapping out the router (if you can).
Even though the swap solved it, I still think this is partly an Apple firmware problem. There is absolutely no reason that the new Mac Mini should NOT have worked on my first Home Hub 3000, when everything else connected to it without any problems.