If you directly ANALYZE Git Repository URL for BitBucket on TAP GUI, you would get 404 Not Found error as shown in blow image.
BitBucket Cloud support needs to be inherited through Backstage for Catalog repo. As mentioned in this doc , the following properties could be added to tap_gui stanza in the tap-values manifest to support BitBucket as Catalog repo.
integrations: bitbucketCloud: - username: ${BITBUCKET_CLOUD_USERNAME} appPassword: ${BITBUCKET_CLOUD_PASSWORD}