Home assistant, Victron Cerbo, Tailscale, Teltonika a match made in......

I have a Teltonika 901 in my motorhome, connected to the Victron Cerbo GX, I want it to talk to my home assistant, even when remote. The network SIM in the Teltonika prevents setting up VPNs on the device itself, more correctly it prevents them from working as it doesn't have a proper IP address. Anyway, the 901 can't run Tailscale but I believe there is a cut down version I could run on the Cerbo. Anyone else have any experience with this?