I wish the iOS could show some basic stats such as: ping time, data upload in past hour/day, data download in past hour/day, max up/down speeds over different time windows.
Next step would be to use the ping data or max speeds to make connection choices - like to reconnect to another server in that country (or a set of countries) based on lowest ping or highest speed server.
At the moment it feels like some of the WiFi networks I connect to might be traffic shaping and I wish ProtonVPN would seek out and reconnect to better servers when performance is poor.