I plan on swapping my 50 amp breaker at my main with a 60 amp breaker, I will then have about 20 feet of 6/3 romex going from my main to a 100 amp sub panel. Then from the sub-panel I'll have two 60 amp breakers with #6 THHN going to two chargers.

Does this violate the rule for continuous load?

I know 44A would be the max if I were running it directly from my main but does the sub-panel/THHN change the equation here?

Thanks in advance for any clarity.