It sounds like there’s a rule somewhere that’s hiding the TrustPilot widget on screens below a certain size. I haven’t used Dawn, so I don’t know if it’s out of the box or you just use a Custom Liquid / HTML blow to insert it. But inspecting it (best to do it on a desktop with your browser in mobile mode) should show you what’s happening.
If it’s still something that’s only happening on your phone and it appears fine on desktop browser in mobile mode, it’s possible it’s being blocked by something else (ad blocker in the browser, maybe?)
Check the inspector panel in your browser first and see if there’s a rule that’s hiding it.