Hello,
I've run out of ideas and I'm hoping someone might help me understand if what I am trying to do is feasible.
1. I have authored and published an on-premise feature service with existing data and a relate table attached through a relationship class to the feature service.
2. I have taken the on-premise feature service and created a new URL in my agency's ArcGIS Online subscription and shared the new item with the appropriate ArcGIS Online group.
3. In Survey123 Connect, I created a form based solely on the attribute fields in the relate table. I wanted all the edits and its submission to go straight into the relate table and not the parent layer.
To create survey123 data in the relate table without creating a new record in the parent layer, I changed the form ID reference from the parent layer to the relate table:

and removed any reference to the relate table, at the beginning and end, in the survey123 XLS survey tab:

This setup seems to work great for creating relate records to an existing record in the parent layer without creating a new record in the parent when submitting the form in survey123.
Here's my question...
Can I add, or how do I add, a repeat to this survey123 form?
Since I created this form from an existing feature service and a relate table on my agency's GIS server and database infrastructure...do I have to create a new table and make another relationship class to the parent layer?
If so, how do I nest a relate table (a repeat) within a relate table (a repeat) in the survey123 xls and address the form settings form id? Can a form id reference two relate tables.
Thank you in advance!
-Casey