Hi,
According to the information provided by Swift maintainers, package openstack-swift-plugin-swift3 (upstream repo swift3) is being retired from RDO and will not be in repositories since Rocky release [1].
According to upstream info swift3 has been imported into Swift's codebase as the "s3api"
middleware. Swift3 development is now frozen and all new patches
should go to s3api middleware [2][3].
Users using swift3 may need to adapt their configuration to this change as documented in upstream swift documentation.
Best regards,
Alfredo