Alex,
So this functionality is already available in the out of the box Survey123 app, if you PressAndHold on the Survey item, it will actually skip that Survey Info Page. You can change the default onClick behaviour by editing this code on Survey123/template/SurveyGalleryPage.qml, change the parameter for the onClicked from false to true.
cc: Survey123 for ArcGIS
Thank you,
Erwin.