Hi @Nikolas70 !
Since the 2023 update, you have to turn on Pro Tools and use Rule sets to override previous custom settings, or apply new ones. All hosts can do this, even if you only have one property (previously, Airbnb restricted Pro Tools to Hosts with 6 or more properties). So far it has been working for other hosts with the same issues. Link for Community Guide for Using Pro Tools (has screen shots) below:
https://community.withairbnb.com/t5/Community-Guides/GUIDE-Use-Pro-Tools-to-Set-Calendar-Custom-Pric...
Hope this helps. Let us know if it works for you!