The MockupMirror plug-in for PenPot allows designers to test their prototypes on a real smartphone. The author of the plug-in and the associated companion app for Android smartphones would like to publish his app in the Google Play Store and test the app beforehand. He is still looking for testers for his app. Maybe you are interested?
I think the plug-in closes an important gap to Figma.
You can find more information in this discussion in the PenPot forum.