Routing between Ubuntu OpenVPN and MikroTik

My goal is to be able to connect to private LAN (192.168.1.0/24) via Ubuntu VPS.

For example I want this forwarding: http://{Ubuntu WAN IP}:443 --> http://{Private LAN IP}:443

Please take a look at attached screenshots.

As I understand the problem is in inability to communicate between two gateways 192.168.7.1 and 192.168.1.1.

- Ubuntu VPS knows the route to private LAN subnet (192.168.1.0/24) and MikroTik router knows route to OpenVPN network...

Routing between Ubuntu OpenVPN and MikroTik