How could I use grapple with wagtail TableBlock ?

[Zogsha]

Hi,
I have a StreamBlock. In this StreamBlock, I have table_block = TableBlock(), using wagtail TableBlock.

I tried a classic graphql_fields=[GraphQLStreamfield("table_block")] but I have an "Unknown type 'TableBlock' error.
So I tried to register this StreamField. I already have a CustomTableBlock(TableBlock), with its get_api_representation method overridden, to just expose the rendered HTML table in DRF (works just fine and that is what I want to do with grapple). So I tried to register it with @register_streamfield_block, to use it in my StreamBlock, but I then have metaclass conflict.

I can't figure how to use grapple with this non-conventional block. I guess I'll have the same problem with other blocks like CodeBlock, etc.

Can you help to solve this TableBlock issue ? I am no expert and pretty lost.

Thank you.