There's a couple of options in settings worth checking, as Netguard works for me when roaming just fine. Under Settings > Defaults, make sure you don't have "b

There's a couple of options in settings worth checking, as Netguard works for me when roaming just fine. Under Settings > Defaults, make sure you don't have "block roaming" turned on. Expand the rules for the apps giving you issues, and check "Block roaming" isn't ticked for them.