Expose my TP-Link AX20 FTP to the Internet via WireGuard + VPS

Hello!

I’m connected to the Internet behind a NAT.

I want to expose my TP-Link Archer AX20’s FTP to the world and be able to access it even when I’m not connected to the home network. I got a free VPS Linux from Oracle and set up WireGuard VPN. My router successfully connected to it. When I enable a client to use the VPN I can clearly see it works fine and my public IP becomes the same as the VPS. However, I’m not sure what do I need to do to be able to access the router’s FTP from the VPS’ public IP.

I’d appreciate any help. This is the guide that got me this far.