Dear @Pro4TLZZ ,
I appreciate your time and the screenshot contributions in reviewing my multiple posts. As I stated in my initial post, I am well aware of the Enable or Disable feature for Remote LAN Access on the WireGuard Server side.
However, as I reiterated in my recent post, I believe that a global solution for the WireGuard Server side may not be feasible, as I have multiple devices connected to it, and they would all be affected, which is not my intention.
I am currently intensively reviewing the documentation provided by @admon , yet I find it challenging to understand without similar examples available within the forums. (Perhaps it's time for me to engage in some much-needed catch-up on routing VPN knowledge.)
Perhaps, a Friday night troubleshooting session will one day shed more light on this dark tunnel. 
May your weekend be as adventurous exploring the GL iNet forums as mine. 