What OS is the jellyfin server running? If it is Linux there are ways to modify the service file to wait for certain conditions before starting Jellyfin.
Jellyfin 10.10.7 (Docker)
Ubuntu 24.04.2 LTS w/HWE
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
4x WD Red Pro 6TB CMR in RAIDZ1