Thank you so much for reporting the issue for Quick Report. We will start to look into it.
Do you know that you can also log an issue with Esri Support, it will be a better way for you to track the issue status.
This issue can be fixed with one line code change. You can open the Quick Report in the Qt Creator.
Navigate to QuickReport > controls > EditControl.qml file. Replacing line 91 with the following code (see screenshot below).
text: maxlength? textField.text.trim().length+"/"+maxlength : ""
Please let us know if you have any questions.
I want to follow up request this question, I think this feature is already added on Quick Report on AppStudio 4.2 and above. I tested this using this feature layer, https://services1.arcgis.com/JXBurs0uwQlwOiHt/arcgis/rest/services/TURT3/FeatureServer/0 , that has required fields, Date and Country (nullable: false).