As it seems, that the PublishBuildArtifacts task is not available from Release Environment.
But as our clients pull new Artifacts Versions from the Azure Repository (universal packages), it would be a great benefit to have an opportunity to publish those Artifacts via an Release pipeline.
Is there any way available?

UniversalPackages@0docs.microsoft.com/en-us/azure/devops/pipelines/artifacts/… - Krzysztof Madej