Option to add custom logic during Entity codegen

I'm looking for ability to add Spring Data Jdbc annotations (@Id, @MappedCollection) for generated GraphQL entities.
Such option allow to reuse existing Pojos for DAO layer and eliminate tons of redundant LOC.

I see that JsonProperty is hardcoded in
graphql-dgs-codegen-core/src/main/kotlin/com/netflix/graphql/dgs/codegen/generators/kotlin/KotlinDataTypeGenerator.kt:116.

Can you please provide some API for users, exposing some pluggable Kotlinpoet functions or something like that...

Without this option it's a disaster to duplicate Entities / Classes, then using some sort of Mappers and other annoying stuff to reach database.

EDIT

Also, all collections are mapped to List, although handwritten Set works. Most ORM / ORM-like frameworks require Set collection over List for relationships. Usually, List servers more rare cases in database mapping.
Ability to set Collection type also falls into "must have" zone.

Start by reading graphql-dgs-codegen-core/src/main/kotlin/com/netflix/graphql/dgs/codegen/generators/kotlin/KotlinDataTypeGenerator.kt around line 116, where JsonProperty is hardcoded. Review how generated Kotlin entities handle annotations and collections; done should provide a defined extension point for Spring Data JDBC annotations and a configurable collection type.