Within CSM workspace if you open a task-based record or incident you will get the open to have the email compose option available.
I tried setting up the email_client=true in the attributes of the sn_myforms_form table. It didn't seem to work for the workspace. It might have given access to email on the platform view, but not within the workspace. This question isn't really table specific though as we'd like to add this feature to tables as the need comes up. I also tried changing the settings within UI Builder to turn on the email mini compose to no success. I was wondering if there is a straightforward way of getting this setup within other tables/records that don't have it setup out of box.
My screenshot is an example of how our incidents will have the email mini compose available within the workspace.
