...what would "feature parity" even mean? There's no universal checklist of api frameworks "required" features.

Short answer: no, bc FastAPI makes no assumption about your ORM (bring whatever, use none... your responsibility, your choice - I use sqlalchemy core + databases module for async support, no ORM, but but full use of Pydantic for enforcing schemas, just "divorced" from persistence layer, maybe you don't even need any), or your anything else.

I actively dislike DjangoREST and tbh Django too... but I admit that in combination they can save A TON of time when prototyping something.