Hi @GarrettRSmith ,
Yes, actually it is possible with Survey123 field app to select an existing point on the map using the Inbox, and then update the attributes for that point, or add related records via the use of a repeat. Not sure if this would work for your workflow, as requires Inbox to be enabled.
Alternatively you can use a web map or other applications such as Field Maps or Collector, to display the web map and layer of points, and then when the user selects one of the point, the pop up will contain a link to take a survey, which will launch Survey123 and the pre-defined survey form.
Regards,
Phil.