Using a toolset heading block in the new Appearance-->widgets layout. add a Heading block and toggle on the Margin/Padding or give it a background color, there are no console errors but these settings are NOT applied to the elements inside the widget on the frontend
will do this afternoon, however it won't help you I don't think, I did Nothing special. Simply adding Any toolset block to a registered sidebar in appearance widgets, and it's inline styles all show up in the editor but on the front end they are not being applied. do you not have this issue when testing?
Widgets made using Toolset Blocks seems not compatible yet, our Devs will require to work on that and it will be a new feature request as WordPress just published this feature that you can build widgets in Block mode.
I will not have any ETA on it when the compatibility is offered but as on now if you able to build widgets using legacy way you can go ahead.
I understand. although WP just released this feature, the early release of WP 5.8 had been out for some time, and it would be nice to see this work preemptive in the future so that once something is in the release channel our clients can use these features. I'm sure this is not a complex issue and will be a fairly easy fix for your devs to clean up.