I don’t actually own a Meshtastic device… but I did blow off work to do a little browsing and found this:

Meshtastic does not require any license and is open for anyone to use.

• www.austinmesh.org/learn/

Meshtastic does not require a HAM radio license to operate

• chicagolandmesh.org/guides/getting-started/

don’t need an amateur radio license for the low-power bands used by Meshtastic

• centralvalleymesh.net/docs/faq/#q12