Apologies for some cross-posting with the ArcGIS Pro community. I am using Pro 2.2.4 and am unable to select by attribute for date/time when the data are an AGOL hosted feature layer. I do not have any issues with date queries for file-gdbms, SDE and shapefiles. Interestingly, the new Crime Analysis Select by Date and Time gp executes the query against an AGOL feature layer without issue.