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Fast API seems like the other mature framework but it's a pain to make it work with Django from what I read.
Django Ninja is the new player in town, quite flexible, lightweight, and covers my use case, but not sure is mature enough or how long it will be supported.
Other than DRF, TastyPie is the other REST API framework for Django I had used in the past.
NOTE:
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Hence, a higher number means a more popular project.