Embedding reviews in the form

Other than providing a link, is there a way to embed a review module that ties to TrustPilot, ResellerRatings, Google, etc?

You can embed an HTML page using the Iframe Embed widget provided that it is allowed by the 3rd party review websites. According to this page, TrustPilot allows their user to embed the reviews to their own webpage.

Here's a guide on how to add widget to the form. Hope this helps. Thank you.