Hi all, Can I somehow query all the registered versions for a given task/workflow name by FlyteRemote?

yes, you can use list_task API. https://github.com/flyteorg/flytekit/blob/a9c130800168df54149e3f33518d462e5a13a3ec/flytekit/remote/remote.py#L591

list_tasks_by_version lists all tasks for a given version, I wanna get all the versions (like v1.0, v1.1, v1.2) for a given task name.

ah, have you tried

self.client.list_tasks_paginated

yes, this is it. Thanks!