7 files declare their use of ResourceTypeRepositoryInterface in Drupal 9

EntityAccessChecker.php in core/modules/jsonapi/src/Access/EntityAccessChecker.php

EntityResource.php in core/modules/jsonapi/src/Controller/EntityResource.php

EntryPoint.php in core/modules/jsonapi/src/Controller/EntryPoint.php

FieldResolver.php in core/modules/jsonapi/src/Context/FieldResolver.php

JsonApiDocumentTopLevelNormalizer.php in core/modules/jsonapi/src/Normalizer/JsonApiDocumentTopLevelNormalizer.php

ResourceTypeConverter.php in core/modules/jsonapi/src/ParamConverter/ResourceTypeConverter.php

Routes.php in core/modules/jsonapi/src/Routing/Routes.php