You might look into grids and pages for more efficient use of screen real estate in the Survey123 App. The downside is that you're only able (as far as I'm aware) to design a survey for one type of device/orientation. If you set up grids for a tablet in landscape mode and then someone with a smartphone uses the survey, they are going to have a rough time using the form in the app because it doesn't resize the elements.
There's a template in Survey123 Connect called Grids Layout that is very helpful, especially when it comes to spanning groups/repeats that are nested in other groups.
https://community.esri.com/t5/arcgis-survey123-blog/survey123-tricks-of-the-trade-groups-grids-and/b...