I have a test setup I plan to add NPM to. Thanks for working through this with us. I will be writing up some updates to a bunch of documentation and this is now on my to-do list.
Jellyfin 10.10.3 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)