Thank you in advance for your help.
There should be a preview for the report that spits out a low resolution preview that doesn't consume credits.
You might have to change the way Survey123 collects and records the geopoint:
Otherwise here is some reference material, doesn't specifically answer your question but helps with syntax: https://doc.arcgis.com/en/survey123/browser/analyze-results/featurereport-map.htm
There is additional information here regarding pulling data, specifically coordinates. It has different formatting then you provided. I will try exporting different ways and run sample reports to save credit https://community.esri.com/t5/arcgis-survey123-questions/can-pulldata-geopoint-pull-lat-long-in-dms/....
Either way I think handling the conversion in the form is the way to go! I like what you found in that you can display in the form different than the report if that is important.