There are 3 German speaking countries: Germany, Switzerland and Austria - there is only Germany listed and no Switzerland +41 or Austria +43
So it’s also not possible to set the correct language (Germany = de | Switzerland = ch | Austria = at) domains
Hi there and welcome to the Community, @Reinhard_Fust 
I’ve forwarded your request to the devs and will report back once these countries are added to the list 
There are three languages available in Switzerland: Italian, German, and French! I’m having a major problem with the websites I manage in Switzerland. The Italian prefix is now appearing, and customers are getting really annoyed.
Hi there, @Jvan_Bontognali_Opif
I am genuinely sorry for all the inconvenience!
I’ve shared your feedback with the dev team, and they’ll add the requested countries to the country code list soon. We’ll keep you updated!
Thank you for your patience and understanding 
There should also be the option to disable other countries. What’s the point of including Iran, Bangladesh, Japan, etc. when they’re a local entity operating within a 50km radius? A ridiculous and inconvenient result.
Sorry guys, but you’re causing enormous damage to my business. I use these forms for many sites that invest thousands of Swiss francs a month in advertising campaigns, and now with this change (since Switzerland isn’t available), the phone number field can’t be filled out, and obviously the form isn’t sent. You’re responsible for this. I reserve the right to seek compensation if a client of mine claims damages.
I have temporarily added a normal number field (#) to my form, which is a workaround that solves the problem for me at the moment.
@Jvan_Bontognali_Opif I completely understand your frustration, and I’m really sorry for the trouble this has caused 
Our devs have already made a list with the missing countries for the Phone field, and they’re working on adding them. If all goes well, they’ll be available really soon. I’ll update you right here as soon as I hear back from the team.
As for your suggestion to choose which countries should appear in the dropdown, that’s a great point! I’ve added it to our Wishlist - Option to choose which countries should appear in the Phone field dropdown . If more users support it, it may be considered for a future update.
In the meantime, if you’d like, our devs can help you exclude specific countries from the dropdown list using custom code. Just let me know which countries you’d like to remove.
If you’d prefer not to use the Phone field (even once the Swiss flag is added), you can opt for the Number field, as @Reinhard_Fust suggested. It works just like the Phone field did before the update.
I noticed you have around 40 Form widgets, and if you need any assistance with replacing the Phone fields with the Number fields, just let us know. We’re happy to help!
However, we’re hopeful that the devs will be able to fix everything soon, and that you’ll enjoy the new features to the fullest!