Upvote:3
As xngtng pointed out in his comment, it depends, but at least within the EU/EEA, in most cases, the network traffic is routed via your home provider and for geolocation purposes, it will appear as if you are in your home country.
The reason is btw not that you should have easier acces to p**n, but that your home network provider wants to have real time access to traffic volume metering and used to want the ability to throttle your network bandwidth. Since July 2022 network operators are not allowed anymore to apply bandwidth throttling when customers are roaming within the EU/EEA.