Bidirectional access in repeater mode

I think I’m asking for the impossible here, but I’ll give it a go.
I have an MT3000 (Beryl MX) in my caravan. I have a number of IOT devices and a home assistant server that connect to the router in the van. I get internet access by having the router in repeater mode and connecting either to my house network (& internet) or to starlink. But is it possible to connect to the internal network from the house network without using products such as zerotier/wireguard…?.

Solved with port forwarding on the router. Sorry to waste anyones time, but I really didnt know the answer at the time.