Type currently unsupported for BigQuery: StructScalarType

Wondering why the StructScalarType is not supported in the Google BigQuery integration. Looks like the type was never implemented in the schema file. https://github.com/hasura/graphql-engine/blob/3db241155dcd22dca9f5164ec6051ef0dd05550a/server/src-lib/Hasura/Backends/BigQuery/Instances/Schema.hs#L157-L180.

I'd like to attempt adding support for this type. @chrisdone @nicuveo @psibi @aniketd @0x777 do you why this field wasn't originally included in the initial BigQuery PR https://github.com/hasura/graphql-engine/commit/f7a202a363dce69c3980b7bb57cbd5c07e258a1c? Is there some limitation that I will encounter when trying to implement?