Why does my RAM use 13/16GB on a fresh Windows 11 restart?

I'm very confused. The processes in the task manager do not add up to 12GB. maybe 4 at most.

The other stats in task manager for memory say:

In use (compressed) - 13 GB (371 MB)

Available: 2.5 GB

Committed: 15.0/27.0 GB

Cached: 2.5 GB

Paged Pool: 400MB

Non-paged Pool: 410MB