A new release should be available in Software Center, now we have more options to test like Allowed IPs, DNS and MTU.
The server MTU sets the tap interface MTU which is used for traffic between container and host/network.
I don’t know if it’s really needed but to set the wg0 MTU in the container:
runagent -m wg-easy1 podman exec wg-easy-app ip link set dev wg0 mtu 1300
Check wg0 MTU:
runagent -m wg-easy1 podman exec wg-easy-app ip a s wg0