I have a broader question. Is there any possibility to use a brain tree for the flutter web? I was searching for an API on pub.dev but there was only one for Android & Ios, but not for Web.
If there is one do you have a link to an example project, I just don't seem to find anything about the detailed integration
You can use Braintree using API calls with their GraphQL client. Read the whole guide on how to make API calls on their website. Making API Calls