I've recently gotten an Elitebook 845 G10 which runs on a Ryzen 7 Pro 7840HS, and battery life was at first shit. The issue was with the BIOS being bugged and not allowing ASPM. After manually activating, I now get around 12-15 hours on a 50Wh battery, depending on use of course. Results still preliminary though, more testing needs to be done.
Btw, I chose the Elitebook because it actually features great repairability. Pretty much everything can be swapped out, including memory. I was reluctant to buy HP, mostly due to the reputation they earned with their printer business shenanigans, but so far don't regret the purchase at all. In fact I like this device more and more.
Pretty much everything worked out of the box with ArchLinux, except for ASPM, which I was able to fix within a couple hours.
edit: Oh and the main motivation behind preferring the Elitebook over the Framework was the price. I mean really? Upgrade to 7840 almost 400 Euro? Lenovo charges like 80 Euro for that. For 1200 Euro I got the aforementioned CPU with a beautiful 120hz, 500nits, 2560x1600 screen, 2x16GB 5600 DDR5 SO-DIMM, 1TB NVME, etc. But it was a student offer.