Oh, I didn't expected anyone to use my EFI.
I also noticed an extended boot time after the Monterey update and thought that something had gone wrong. Trim always took 30 seconds. After deleting an unused space at the end of the drive and a fresh install, the boot time is about the same like Windows. In my case 22 seconds from the OC menu. It's an 970 EVO NVME. I read about slow boot times on Samsung drives, but also on a Zenbook from my neighbor with a Samsung OEM drive, normal boot speed. Maybe after some time it will get worse, we'll see.