I can't say whether this is a deliberate choice or not. But I'd assume that shuffling whole libraries was purposefully left out due to issues with potentially huge libraries and the resulting queue.
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)