OK, So we have a Mikrotik LTE radio working as a CPE.
The LTE radio gets a publicIP from the LTE provider.
We also have a CCR acting as an edge router where we have many VPN accounts created
We also have our own /20 assignment.
Can we configure the LTE radio so their IP appears as one of ours.
I have tried tunnels, etc without success as even a speed test indicates the LTE provider’s IP.
If you mean CCR working as VPN server, LTE as VPN client, and routing all traffic from devices connected to LTE via tunnel to CCR and accessing internet from there, then yes. There’s nothing special about it. In VPN client on LTE, enable “Add Default Route”. On CCR, allow forwarding from VPN interface to internet and add srcnat/masquerade rule. Done.