Even though there is no KB article or Spirent official documment that lists all the modules that supports Group Histograms, this information is available on the spreadsheets on each module family, these spread sheets are publicly available and can be found by searching for " *module type* Spirent card spreadsheet" on any search engine. (i.e FX2 spirent card spreadsheet takes you to: https://www.spirent.com/assets/spirent_fx2_datasheet) And you will find it under Technical information section:
*Example from a card that does support Port-Level Histograms, cards that does not support this, will just not listed Histograms under Technical information
You may find usefull the following KB articles: