Good News, Brett!
We have just released the functionality for users to preview a PDF on mobile before completing a submission!
Take a look at the release notes for this feature (and several others!) here, and be sure to check out the Help Center topic for more details on how to preview the Submission PDF on mobile.
Thank you for this feedback! Being able to preview a PDF prior to completing a submission is one of our most requested features. I would definitely suggest upvoting the existing Feature Request, as it ensures these items are recognized and considered by our Development teams:
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