Feature tags usable in calculated fields

We use feature tags to tag which of our internal teams work on a feature. I would like to make a chart that shows our features delivered each sprint by team but don't want to double count the features when more than one team work on a feature. So ideally I'd like to have a calculation column in my report that is 1/(number of tags).

My chart will double counts features that are tagged with multiple tags.

Allow feature tags to be used in calculation fields (specifically length(field("Feature Tags")) returns number of tags)