I've gone ahead and set up the L2TP VPN server on my XE75.  VPN address range is 10.8.0.2 - 10.8.0.10; the main Deco XE75 is on 192.168.98.1, with additional nodes at 192.168.98.254 and 192.168.98.253.

When I connect remotely from a Mac running Sequoia 15.4.1, I connect without an issue and get an address of 10.8.0.2.  I can ping 10.8.0.1 and get a response.  But I can't reach anything on the 192.168.98.x side of the Deco.  Do I need to set up routing between the two networks?  I'd at least like to use Microsoft Remote Desktop to access my PCs at home.