Do you have issues with transcoding in general or just tone mapping? If the latter, it would be an issue with the compute runtimes. If the former, it would be something else.
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