Ventura docs for M2 Macs in this comment: https://gist.github.com/henrik242/65d26a7deca30bdb9828e183809690bd?permalink_comment_id=4555340#gistcomment-4555340
Old Monterey docs in this old revision: https://gist.github.com/henrik242/65d26a7deca30bdb9828e183809690bd/32c410e3a1de73539c76fa13ea5486569c4e0c5d
Solution for Sonoma: https://gist.github.com/sghiassy/a3927405cf4ffe81242f4ecb01c382ac
Thanks, yes it certainly looks like an EFI lock doesn't it, but as you can see from the screenshot of the lockscreen it mentions an "organisation" It must be an EFI lock set by that company, but it perplexes me that the other attached screenshot showing the status of the machine on sickw site (which must come via some backdoor from Apples servers?) distinctly says that the machine has an MDM lock. Very weird and annoying.