Setting up Navidrome through WireGuard-based VPN

So. Basically i did set up the Wireguard service on a rented remote server.
And the following issues are:

  1. Even tho i did set up all of my devices in one network - for some reason my PC can’t ping to my laptop, but can ping the phone (and laptop-phone is also possible, but not laptop-PC)
  2. How can i set up Navidrome for my phone using that rented server? (since the PC does not have a white IP address) Is there any way of doing it without the requirement for the PC to have it’s WireGuard connection always turned on?