Windows 11 - Firefox and Iphone - Noone can see my Postet Locations

Hello...
i have a problem.. When i add Merchants Locations i can see it on the List but others not..
I tryed it on the same Network at Windows 11 Firefox and Iphone Chrome...
When i use my Phone on WIFI i see the Locations but when i use my Mobilnet i cant see it.
So i think i have a Kind of Network Problem..
But i dont know where to search..
Did you understood my Problem ?

Greetings