I have a TP-Link Archer as VPN server at my Dad's old house. Can ping & connect to everything in the remote LAN, but can only ping the TP-Link. The TP seems to block it's web access via the VPN, but I think that's a router limitation.
Not really a problem for me, but will check the config & let you know on Sunday when I'm there in case it helps.
No special routes, etc. in the client config. Local = 192.168.123.0/24 and remote = 192.168.2.0/24