I'm on a road trip between England and Paris. I've used a 200kw Fastned public charger and a Total energies 400kw charger so far.

The Fastned charger peaked at 125kw before reducing right down to 75kw when the battery reached about 75%.
I'm currently at the Total energies 400kw one and the battery is at 50% and it's charging at 115kw.
Why am I not reaching peak charging speed? Is there a setting I need to change in the car menu?