ArcGIS Pro 3.3.1
The Make Query Table tool produces Query Tables that have a hidden SQL Expression.
The SQL expression behaves similarly to a definition query but with some differences:
It is very important to know if a Query Table has a hidden SQL expression.
Could Pro be enhanced so that there is an indication that the SQL expression exists? Such as a warning bar in the feature layer properties.
Related: Layer description in feature layer properties (including Contents hover-over functionality)