Hi @mattkramer,
It is only possible to sort the survey gallery via two options, alphabetically or by the date the survey was last updated/downloaded. There is no option to sort by last used/edited based on survey data on the device.
I would suggest you create this as an ArcGIS Idea on the Survey123 Ideas page: https://community.esri.com/t5/arcgis-survey123-ideas/idb-p/arcgis-survey123-ideas
Alternatively you could raise an enhancement request via Esri Support.
This is something that could be considered in the future if there is more demand and use cases for this type of enhancement.
Regards,
Phil.