Max-Q/Max-P branding was simply abandoned, somewhat in favor of power target
https://www.notebookcheck.net/NVIDIA-RTX-30-Ampere-Mobile-will-no-longer-offer-Max-Q-or-Max-P-branding-OEMs-free-to-decide-TGP-and-Max-Q-features-to-implement.515922.0.html
As usual you need to read reviews for the products you're interested in.
Glad to hear I wasn't the only one having this issue, there aren't that many reported instances of it on the Internet it seems. Just wanted to note that I was testing a FX504 recently and had exactly the same issues noted in this thread with BIOS version 310, power limit throttling at 25W TDP that could not be modified in software.
Out of the box I get ~949 in Cinebench, I was able to increase this to a ~1012 average with a -0.150v undervolt though. Temps were perfectly fine, never passing 74c in Aida64 stress test.
I also noticed that while gaming for a few hours while plugged in, the battery charge level dropped from 100% to 85%, perhaps indicating that the 130w power brick isn't able to provide enough power to the machine, which may be why they've limited it to 25W in the first place. This makes me wonder if a future BIOS update would help, if adequate power can't be provided with the limit in place how will it go with a higher limit / limit removed? Maybe they could do something to only limit if the overall system power draw is past a certain point rather than just arbitrarily always limiting the CPU to 25W.
I outlined this and the results/benchmarks in full details here if anyone is interested: