With the help of support and some trial error there is a solution to this.
Modem makes to many endpoints and can’t be mounted, to fix you have to use AT commands outside of the LHGGR
”AT+GPS=0” - turning off GPS
This will turn off GPS and reduce mount-points and in the end the LHGGR will mount the modem and everything will start working.
So for everyone with a LHGGR and a DW5821e/DW5821esim/T77W968 modem, disable GPS on the modem.