If your plan was to restore your snapshot, you chose the wrong installation method. What you have now is known as Home Assistant Container (Linux + Docker + Home Assistant Core in a docker container).
There are only two installation methods that support snapshots:
- Home Assistant OS (what you had on the RPi4)
- Home Assistant Supervised
With an Intel NUC, you have the option of using either of the two methods.
The four official installation methods are summarized in this table.