In the ProtonVPN extension I can search for a location, then click the location and it will connect to (I think) the best server in that location. For example, I can search for 'Phoenix' and just click that, and it will pick a server in the Phoenix area for me (I am assuming it's the best one at the time of connection).

In the apps, you have to select the individual server manually. Please make the app able to connect by selecting a general location like the extension.