GL-AR750S-Ext can't ping or remote desktop on the router with wireguard

I have wireguard Server on PC DDNS and Public IP.
wireguard clients on PCs different locations
and GL-AR750S-Ext as a client wired with some NVRs and PCs
the issue :
can ping and remote desktop any clients from any devices on GL-AR750S-Ext but cant ping or remote desktop from any clients to GL-AR750S-Ext devices.

any advice ??

Sorry cannot understand. But generally people want to ask how to connect to the clients of AR750s from the server side.