The Timeline custom slicer is very useful and allows for far easier period selection than the stock timeline slicer. Yet it does not work with slicer sync. If this support can be added it would be very helpful.
The latest version of Timeline supports Sync Slicer feature now
Thank you for your suggestion.
We'll consider this feature in upcoming versions of Timeline Slicer.
We'll update this idea once feature is implemented.
Microsoft Power BI Custom Visuals
I think that this will be a great addition. I know our company has many reports that are waiting for this feature to be implemented before we can publish the reports to our customers.