Reporting multiple pulses via automations

Hello, In our services we calibrate instruments for our customers, every customer has about 100 or more instruments. Said that, monday.com has a behaviour that treats individually every item or pulse and this can integrated or automated but individually, i mean there are 50 instruments close to the due date, so it have to be 50 automations triggered to send 50 emails to the customer that his instruments due date is close.-

What i am proposing here is to have an automation that with some rules can report, notify, or do some more actions on multiple items or pulses.

For example:

WHEN DUE DATE OF ALL ITEMS OF THIS GROUP ARRIVES NOTIFY SOMEONE

I mean, to have in this cases just one report or notification (or integration via gmail) to send to the destination…