GraphQL | Explorer via Altair not accessible & CORS issue from web app

I've setup a locale environment within docker, created a database and a web app with corresponding hostname. I'm able to use the .listDocuments API. But when I try to use GraphQL, I get a CORS error.

Also when I want to access the GraphQL Explorer through Altair, I'm not able to load the schema/docs. _APP_OPTIONS_ABUSE is set as disabled as advised by https://gist.github.com/stnguyen90/8b6b80682d80cfec130a61e60e07d1f9#file-start-appwrite-graphql-explorer-sh-L3.

What should I do extra to avoid the CORS errors for GraphQL from within my web app? And how to access through the GraphQL Explorer/Altair?

Where are you making the API calls from?

A web app? Did you add the web app as a web platform?

Both from a web app and from the GraphQL playground (Altair). The web app is added as web platform.

I though, I would be able to create my own GraphQL queries/mutation. But apparently only those provided within the docs are available., right?

Something like query { todos( databaseId: "655502fec6ccfd1dbd82" ) { _id description } } won't be possible, I guess?

https://appwrite.io/docs/references/cloud/client-graphql/databases

Did you have added a platform in the console with the corresponding domain?

Yes, the platform is added with the corresponding domain. It's working fine. I wrongly thought, I could create my own GraphQL queries/mutations as I mentioned above. Apparently, it's not possible. Only those from the docs are supported, which makes GraphQL a less interesting option unfortunately. Anyway, the service as a whole is awesome.