10: def invoke_external_task
11: repo = ::Katello::Repository.find(input[:repository_id])
12: binding.pry
=> 13: repo.backend_service(smart_proxy).refresh_if_needed
14: end

[1] pry(#<Actions::Pulp3::Orchestration::Repository::RefreshIfNeeded>)> tasks = repo.backend_service(smart_proxy).refresh_if_needed
=> [#<PulpRpmClient::RpmRpmRemoteResponse:0x00007fd9260da550 @name=nil, @url=nil>]

This should be a task but it is not. It works however in pulp-rpm-client 3.32.2.