Embarrassing… a little extra reading would have solved my issue. Thanks again, Steve!

No way! Is this the same stevearc that made vim-arduino plugin? I was about to open an issue on the repo! But it might just be my setup of the lazy plugin manager.

Anyway, thanks for the tip here! Since so much is setup with Lua the command just says “Last set by Lua”. I’ll have to dig around some more.