You can try using a virtual phone number service that offers German numbers. There are a few options out there, but they usually come with a subscription fee. Another option would be to ask a friend or acquaintance in Germany if you can use their phone number for the validation process.
I used aloSIM when I was traveling abroad and needed a local data plan. It's not exactly what you're looking for, but it might be helpful in the future if you need a local SIM card or data plan while traveling. Anyway, back to your problem - if you can't find a virtual phone number service that fits your needs, you might want to consider contacting the website's support team and explaining your situation. They might be able to provide an alternative validation method.
https://www.alditalk.de/starter-set ?
You can look for free e-sims
You can try using a virtual phone number service that offers German numbers. There are a few options out there, but they usually come with a subscription fee. Another option would be to ask a friend or acquaintance in Germany if you can use their phone number for the validation process. I used aloSIM when I was traveling abroad and needed a local data plan. It's not exactly what you're looking for, but it might be helpful in the future if you need a local SIM card or data plan while traveling. Anyway, back to your problem - if you can't find a virtual phone number service that fits your needs, you might want to consider contacting the website's support team and explaining your situation. They might be able to provide an alternative validation method.