@Hyolobrika Yes, you just import it into your OS's certificate store. If you operate your own CA root you can just import that one cert into every device and they'll all recognize your self-signed certs as trusted.

This is harder to do on Linux which has far less mature concept of a global certificate store and may even differ between distros (last I checked RHEL has the best solution and I tried to get traction cloning their scripts for managing certs and blacklists into FreeBSD), but it has improved a ton within the last 5 or so years.