Hi everyone. We found a workaround that may potentially work for you.
In our use case, we wanted to sort a timeline by crew members, and we needed the ability to rearrange the crew members on occasion.
We created a separate board with all of our crew members listed. Then, using a connection column, we connected the Timeline board to the Crew Member board. In the Timeline settings, we grouped the timeline by our connection column.
Now, when we re-sort the Crew Members board, the changes are reflected on the Timeline.
So, it can be achieved if you group by a connection column. We haven’t attempted this on the workload widget yet.