> who developed the mobile app on React Native or Vue.
well, since "OR", I would say that with RN to work comfortably. Not what it was 2 years ago. Projects in xcode start sensibly (at least with the create-react-native app + eject).
Servatory happen, but anyway, now something in the style of the cups and plates you can easily sketch for the mobile platform, and considering that there is experience of developing with react, RN for me the choice is obvious.
With vue I can not compare.
p.s. experience in mobile development isn't the big android nothing serious wrote. In the current work, a desktop app on electron + mobile. Use react-native-web code is written just below the 2 platforms, but there are files that are addressed to specific platforms (desktop or mobile)