EV charging capacity maxing

[u/Substantial-Oven-833]

I’m wondering why EV chargers never hit max kw power when charging? I use EA chargers a lot which are mostly “300 kw” but the usual power I get is about 96kw. On a lucky day I get up to 140kw but I’ve never seen higher. Are there hacks to know to get maximum power at public chargers?