Multiple lists of preferred networks

I'm quite frustrated that, for my trip to France (from Romania) I have to empty my preferred networks list if I whant to plan a trip based onnly on the Ionity network. For Romania I can use a list with over 15 entries. But if I whant to plan a trip across Europe relying only on the Ionity network I have to delete from the list all the networks that are present also in Romania.