Trying to use the "Certification Completion" report source, but there doesn't appear to be an option to have a filter where you can select multiple certifications. "Fine, I can just tag the certifications and filter for that". Nope, can't use tags either, because that report source doesn't allow you to filter by them. "Maybe I can create a custom field for all certifications and filter on that". No, because certifications and programs don't allow you to create custom fields as far as I can see.

Which brings me to the point of this. Yes, it would be lovely if the above was resolved (in any of the ways listed), but more generally it would be useful for someone in the development team to look at standardising support for features across the relevant reports. If something supports tags, then reporting and filtering on tags should be included. Appreciate adding multichoice filtering for certifications or custom field support would be a bigger task, but hopefully adding consistent tag support across all reports where the relevant feature (course, certification, user, etc.) supports tags shouldn't be too tricky (or break compatability for people who currently use the report).