yes, this is very likely. as you must have some condition in your both cases as well you must be seeing data against your dimension values and hence there is slight difference in visits number, when look at line item wise data.    

Need to do the prod testing then to make sure all data is properly passing.  However, how can you sure that 100 users interacting with the app? and adobe reports show data of less than 10 users. This needs to be debug.

Please check the processing rules of your dev report suite and prod report suite. It seems that there is some mis match in setting of processing rules.

Awesome!! Thanks so much for sharing.

As per my knowledge, you can't directly add anything in line graph itself. However, you can always use text area and add details into it.

Thank you @Krishna_Musku. @Arpit1401 Please follow the toolkits shared in thread and that will help.

Thank you @kamlesh-maddheshiya 

Yes, there is Adobe plug-in called 'getTimeToComplete', This is will help to track the time completion. Refer : https://experienceleague.adobe.com/docs/analytics/implementation/vars/plugins/gettimetocomplete.html?lang=en  

Thank you @Jennifer_Dungan 

Thank you @yuhuisg