This module was tested on 7th December 2018, using Drupal 8.6.4 with DX8 5.2 using version 8.x-5.0-rc26 of the module.
There are no known issues using Webform with DX8.
When using a Webform as a block, you can style your form by placing the block inside of a container and then targeting the classes on the form within the style tree on the container element.
Link to the module
The module can be found on Drupal.org here.
Not working for you?
If this is not working for you, raise a ticket with our Customer Success team on our help center and we will look into your issue.