Zend certified PHP/Magento developer

Best way for handling large quantity of different custom automatic emails

Using:

  • Magento version 2.4.6
  • Hyva theme version 1.2.3

Issue:
What would be best practice for setting up a large quantity of different automatic email responses?

Background:
For a webshop selling hundreds of different technical products, I need to send an automatic e-mail, with installation instructions for the ordered product.
Because each product has different installation instructions I would need to be able to set-up thousands of different rules to automatically trigger the correct automatic email reponse.

Possible solution:
“Follow up mail” extension from Amasty seems promising.

Are there any other good alternatives or better ways to set this up?