What is your use case for navigating? I feel like if I’m in a new place OrganicMaps isn’t so great for discovering POI. But if I’m in a place I already know decently it’s pretty rare I need navigation anyway. I’d like to use OrganicMaps more though :)
Seems like a nice option to have! FFsend is my go to https://github.com/timvisee/ffsend
If your laptop supports esim you can checkout https://esimdb.com/ which as a pretty comprehensive list. Most of these are prepaid for X months and you get Y GB of data. So could fit what you need.