How many kW at level 3?

I know different level 3 chargers promise different rates but I swear my blazer is not charging anywhere near close to what it is advertised as. I rarely use level 3 but when I do I am always disappointed. I always precondition the battery (it always tells me instantly it’s ready… which is questionable to me?) and yet the max I’ve pulled is 37 kW. And that’s at 21% battery, where the speed curve should be at its highest, no? I’m just curious what is a normal rate of charge on level 3? It’s difficult for me to figure out in the owners manual. Anyone else also experience this? Oh ya— blazer ev 2024 lt awd for reference Thanks!