ProMods

Is there a compatible Portugal map mod?

I think no

No, the only map with Portugal is TSM but it is uncompatible with Promods because they share some cities, besides none of TSM maps include the islands like spanish Canary Islands/Balearic islands or portuguese Madeira/Açores, but even the DLC Vive la France didn´t include Corsica, Guyana, St Pierre et Miquelon, Martinique or Réunion and the DLC Italy didn´t include Sardinia (i dunno why cuz there are a lot of trucks in european islands, not only in mainland but it is what it is, i should say that due the troubles where i live, it would be appreciated that you include all the regions from the countries even in games, France is also their outre-mer regions, Italy is Sardinia too and Spain is Balearic and Canary islands, Ceuta and Melilla too and Portugal is Madeira and Açores too, and of course, the british Gibraltar in the iberian peninsula). There is a project for the Iberian Peninsula planned in the next promods´s updates, you can see the thread here: https://promods.net/viewtopic.php?f=2&t=6227
We need to be patient and encourage developers to add new cities of Spain and Portugal. They are doing a great job, it´s only a matter of time. Also it is possible that the game would introduce a new DLC of the Peninsula, we will see in the coming months.

Okay thanks.