looking for equivalent webform select view module on Drupal 8
I believe what used to be webform_views_select module is part of Webform core for Drupal 8.

You can search for entity and choose any of the following elements



configure an entity reference view to be use as options



NOTE1:  Due to perhaps this issue entity reference is not recognized by webform the way outlined above, but it should work if core patch in #7 is applied (as confirmed by reports in this issue)

NOTE2:  Perhaps a work around would be to use content or taxonomy term instead of a view (since view reference is not working) if you don't have great need for views filtering capabilities.