Database Phalanx C-RAM can engage HARMs

[MacFlorent]

I don't know if it is realistic, but in DCS they sure can engage and destroy inbound HARMs.

[Rezzemy]

https://armyrecognition.com/united_states_us_army_artillery_vehicles_system_uk/centurion_c-ram_land-based_weapon_system_phalanx_technical_data_sheet_specifications_pictures_video.html

"Phalanx is a rapid-fire, computer-controlled radar and 20 mm gun system that automatically acquires, tracks, and destroys enemy threats that have penetrated all other ship defense systems"

https://www.rtx.com/raytheon/what-we-do/sea/phalanx-close-in-weapon-system

"Phalanx weapon system to defeat anti-ship missiles and close-in threats that have pierced other lines of defense. On land, the U.S. Army uses it to detect and counter rocket, artillery and mortar systems.

Harms are similar to rockets and artillery, and mortar systems when you think about what they do and where it comes from, (hits an area, comes from the sky). DCS limitations may change this from the real thing in certain elements, but the C-RAM should be able to shoot harms.