Expression to get number of invoices with 2 or more suffixes
So I am ingesting invoice data. The first time an invoice is created it has no suffix. Then each time it is updated a new suffix is assigned (A, B, C, etc.).
I can count how many suffixes an invoice has and store that in the load script in a field. But the user wants this to be interactive in the dashboard. For example an invoice might be created in March. Have a suffix created in March, April, and again in May. If the user filters on May they want to only see invoices that had 2 or more in that month. So this invoice might have a total of 7 for example since it was first created. But 2 were created in May. I would then want to count this invoice. But if 1 or 0 were created in May then I would not want to count this invoice.
I have tried several iterations but nothing has worked so far: