Thanks to @tek’s great guide on setting up encrypted boot from nvme on the uconsole, I’ve now got mine booting off encrypted nvme!
Highly recommend doing this if you’ve got a uconsole and are still using sdcards!
Guide can be found here: https://honeypot.net/2026/07/07/booting-uconsole-cm-from-encrypted.html
Just do yourself a favor and actually read it - it has everything you need, but you do have to pay attention.