In Brazil, it is common to pay monthly in installments, that is, every month the person will make a payment due on the 10th, for example.
This way, when I make a payment entry and define that it will be installments, the appsheet will automatically generate entries based on the amount of installments that are defined.
This automation or expression would make the job easier as I wouldn’t have to enter the same entry multiple times with just different dates.
I think you need an extra table where these installments would be, and create child records with a loop based on the parent information (like the start date, number of installments, etc)