Hello @EgleAdmin,
It is possible to extract the survey from the mobile device, the survey is stored in ~/ArcGIS/My Surveys/<surveyItemID>/esriinfo within that esriinfo folder there will be your XLSForm, media folder, scripts folder etc.
Where exactly that ArcGIS folder resides depends on OS, but if you open your files app typically the ArcGIS folder is:
Android -> Internal storage/Android/data/com.esri.survey123/files/ArcGIS
iOS -> On my i<device>/Survey123/ArcGIS
Windows -> C:\Users\username\ArcGIS\My Surveys
It won't be possible to recover the form item in your ArcGIS Online content so you will need to republish the survey as new.
Thank you,
Zach
