[BE98/PRO] Xbox Remote Play don’t work, solved, but…. where's the problem? (From cellular phone)

[BoostOver]

Good morning everyone.
I'm not a technician, but I can put 2+2 together
I own a ROG Rapture GT-BE98…..but the problem must be present with the PRO version too.
Some of you may have read about the problems I encountered with the stock version (UPnP broken) 3.0.0.6.102_37902.
I partially solved them with the Gnuton version 3006.102.4_1-gnuton1.
Test Remote Play on console say:OK!!
Now I'm having another UPnP problem with UDP port 9002.
To get remote play to work, i have two options:
1) Put ip Xbox in dmz
Or
2)Forward port 9002 UDP + UPnP on

Since I stated that I'm not a technician, I think there could be two problems:
1) Xbox isn't forwarding the UPnP command for UDP port 9000.
Or
2) UPnP is still broken.

P.S.
I almost want to throw this router off the balcony.

 

[NoLight]

All you should need to do is port forward 3074 & 9002 both TCP/UDP.

 

[BoostOver]

All you should need to do is port forward 3074 & 9002 both TCP/UDP.

UPnP on + forward 9002 UDP.
But the problem is:
What's wrong, the router or the Xbox?