Let me share my findings, it works for me according to your requirement.
Webforms' Select List won't work with views expose filter as it works with content type/taxonomy. See comment by webform contributor here
To achieve that follow these steps:
1st step I created a new component in the webform named as published?
with the type Select options
and set its default value
as "no" (because it won't show to other user it'll be empty so they can't set an value the you can't filter submissions) and check the Private check box like this

2nd step Create a views page for webform submissions like this

3rd step Add relations using Webform submissions: Data and set up like this

4th step Add filter criteria using Webform submission data: Data field field, expose it, choose Grouped filters
radio option, select widget type as select and set relationship and don't save it yet
5th step For the group filter, there is table below (scrrenshort) you can add your values like you add value while creating the Publish component in webform.

I hope this'd work for you. Thank