Create relation document when creating parent document

Hello, I was wondering whether it's possible to somehow create relation documents when creating a parent document?
Let's say I have 2 collections colA and colB. colA having an attribute referencing a document from colB.
Is it possible to create a document in colB while creating a document in colA instead of choosing an existing one?

Keep in mind, relationships are experimental and may cause performance problems.

Yes, you can create related documents. See https://appwrite.io/docs/products/databases/relationships#create-documents

Thanks a lot!
I currently don't have any database logic implemented, I believe this is only supported when inserting documents using code? So not possible from within a cloud "Create Document" form?