Cannot remote play, even on home network, on my Series X

I changed my home console to my Series X as suggested (I normally have my older One X as "home" since my kids play it without me being logged into it, I am now down to only 1 out of 5 home transfers available). It did not help. It did not change anything. Only my One X is showing up in my console list for remote play. I have even done yet another system reset (keeping games and apps) after that.

Other things I have tried today (based on suggestions I've seen elsewhere for this issue), none of which have helped:

- Change to an alternative MAC address, reboot.

- Restore to original MAC address, reboot.

- Manually change system name, reboot.

- Change to a different network port, reboot.

- System reset and use my android tablet instead of my android phone during the setup.

I still think this issue is possibly something with my account on Microsoft's side but I am willing to try more suggestions in order to "trigger" the remote play/remote access option for my Series X again. Something is not triggering the remote play/remote access to my Series X on my account. If I go to xbox.com and search for a game that I own in the web version of the Xbox Store, I get the option to "Install to" but it only shows my old Xbox One X, my Series X is no longer listed their either (it was until two days ago). Also, some limited connection between the Windows Xbox app and my Series X does work. If I try to manually add my Series X through the Windows App, the Windows App tells me to turn on and log into my system. It can tell when I do this with my Series X and goes to the next pop up telling me to press enable on my system. If I had remote play disabled on my Series X, I do get the pop up screen on it telling me to enable remote play. I do this and run through the text (everything passes) but then the sequence stops here. The "press enable" pop up screen in the Windows app does not close on it's own. If I manually close it and restore the process it quickly and automatically progresses through the first two pop up screens (turn on/log in, and then the press enable one) and stops with a "something is wrong, try again later" screen. This shows that there is some amount of data passing between my Windows PC with the Xbox app and my Series X and is why I believe that this problem I am having is outside of my home and something on Microsoft's end with my account but I am willing to try more if there is something I missed and/or did out of sequence.

Are you offline? Is the Series X your home Xbox?

No my Xbox series x is online and on the same network as my Xbox one and my Xbox series x is set as my home Xbox

Yes. If I’m on my mobile network at work and try to remote play I get black screen.

When I’m home on my wifi it works fine.

But when I’m away or even at home and try to remote play on my mobile network I get the black screen. Was working fine before. Don’t know what happened

i set the series X as the home xbox and it did not let me play MW3 even though i own it.

Edit : When i swapped the series X as my home console it took away MW3 on the series S too. So now i cant play on both consoles.

I used to use the app multiple times daily until I upgraded to the series x. When I chose a game to install remotely on the Game Pass app my Series X never shows up in the list. Same thing with remote play, even though i have gone through everything I need to to set it up and make it discoverable it still won’t connect.