My understanding is that the Jellyfin app passes a URL with an API key to the external player. Why not give it a try yourself? I don't see why it wouldn't.
Jellyfin 10.10.0 (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)