No I didn't do the MASQUERADE.
If I understood what u said it is exactly my set up.
where 10.8.0.0/24 is the openvpn subnet and 192.168.1.104 is the openvpn serverip.
That said as I described before I can connect to the server I can access the internet and the router 192.168.1.1
but I can not access my home assistant server on 192.168.1.177