From what I see here on a test install nvidia-persistenced looks disabled as installed and should be manually enabled (but that might depend on HW configuration):
localhost:~ # systemctl status nvidia-persistenced
○ nvidia-persistenced.service - NVIDIA Persistence Daemon
Loaded: loaded (/usr/lib/systemd/system/nvidia-persistenced.service; disabled; preset: enabled)
Active: inactive (dead)
localhost:~ # systemctl enable nvidia-persistenced
Created symlink /etc/systemd/system/multi-user.target.wants/nvidia-persistenced.service → /usr/lib/systemd/system/nvidia-persistenced.service.
localhost:~ # systemctl status nvidia-persistenced
○ nvidia-persistenced.service - NVIDIA Persistence Daemon
Loaded: loaded (/usr/lib/systemd/system/nvidia-persistenced.service; enabled; preset: enabled)
Active: inactive (dead)
localhost:~ # systemctl restart nvidia-persistenced
localhost:~ # systemctl status nvidia-persistenced
● nvidia-persistenced.service - NVIDIA Persistence Daemon
Loaded: loaded (/usr/lib/systemd/system/nvidia-persistenced.service; enabled; preset: enabled)
Active: active (running) since Thu 2025-06-19 11:01:27 CEST; 4s ago
Process: 4395 ExecStart=/usr/bin/nvidia-persistenced --verbose (code=exited, status=0/SUCCESS)
Main PID: 4396 (nvidia-persiste)
Tasks: 1 (limit: 4915)
CPU: 5ms
CGroup: /system.slice/nvidia-persistenced.service
└─4396 /usr/bin/nvidia-persistenced --verbose
Jun 19 11:01:27 localhost.localdomain systemd[1]: Starting NVIDIA Persistence Daemon...
Jun 19 11:01:27 localhost.localdomain nvidia-persistenced[4396]: Verbose syslog connection opened
Jun 19 11:01:27 localhost.localdomain nvidia-persistenced[4396]: Directory /var/run/nvidia-persistenced will not be removed on exit
Jun 19 11:01:27 localhost.localdomain nvidia-persistenced[4396]: Started (4396)
Jun 19 11:01:27 localhost.localdomain nvidia-persistenced[4396]: device 0000:01:00.0 - registered
Jun 19 11:01:27 localhost.localdomain nvidia-persistenced[4396]: device 0000:01:00.0 - persistence mode enabled.
Jun 19 11:01:27 localhost.localdomain nvidia-persistenced[4396]: device 0000:01:00.0 - NUMA memory onlined.
Jun 19 11:01:27 localhost.localdomain nvidia-persistenced[4396]: Local RPC services initialized
Jun 19 11:01:27 localhost.localdomain systemd[1]: Started NVIDIA Persistence Daemon.
localhost:~