10.10 still supports RPis. This is the last version for 32-bit ARM (RPi 2 and older). 10.11 will completely drop 32-bit ARM support. 64-bit ARM will still be supported.
Jellyfin 10.9.11 (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)