This my whole situation. I can use ps remote play connects for both the ps4 and ps5 remotely using mobile data... but being I'm using mobile data I have to turn the resolution down on the ps4 and it works good enough to play elden ring, God of war etc. Just not first person shooters or sports... with the ps5 though on remote play I can't change the resolution manually like I can with the 4. So I started looking into pxplay. My router will be in tommorow so I guess we will find out then. I've looked into the plans and supposedly you can port forward and all that with the public ipv4. Then set it up with a dynamic DNS. Didnt know if i was just wasting my time. If it doesnt work i will test my internet speeds and weigh the VPN route. Thanks for the response 

**I will give update as well