May never do this but have wondered for at least 3 years

Since I have some time out of the office and am migrating from an Intel MBP to an M2 Ultra Studio waiting on my desk to be powered up in January, I have to ask:

In the SoftRaid user guide, it very clearly says that internal SSDs on Macs can indeed be certified:

If you just purchased a new Mac and are willing to reinstall Mac OS X and the software which came with it, we recommend you certify the internal disk. You will need to startup from a volume on an external disk before you can certify the internal disk. After you have certified the internal disk, you can reinstall Mac OS X and the software you want to use.

As I'm on Monterey 12.7.6 on the now 4-year old Intel MBP, since going to Monterey I have been aware that external booting is not really still a thing. 

Is there any way around this, or is it cut and dry: is it no longer possible at all to certify the internal SSD of a Mac?

Not so much thinking of doing that on the new Studio. But upon migration and closing down this 4-year old computer, I thought about certification in order to (A) just do it since I always wanted to, (B) as a confirmation of disk health. 

My question is if this simply isn't really possible anymore from Mojave forward. 

(p.s. I'm starting to wonder if I'm wrong, and if maybe it's just that I couldn't really create bootable backups using CCC from Mojave forward. Can I still install the macOS on a bootable thumb drive and use that to certify the internal MBP SSD?)