Thanks for the response, however still not sure what you mean...
Using EasyArmy as my reference, I've attached a couple of screenshots:
Options - Overview of artillery options for US platoon
Light - Stats of the light artillery option; M1A1
25pdr - British Arty example of HE +
AT capabilities
The M1A1 is a light howitzer with a gun shield, so not a match for the 75mm
https://store.warlordgames.com/products/usmc-75mm-pack-howitzer-light-artillery?_pos=3&_sid=b0bd472f3&_ss=r
Could you explain further or send my a screenshot please ?
Much appreciated