As my username would suggest, we’re in New Zealand. My daughter is 8 and has at the start of this year joined a WAG STEP 4 team (which is the NZ equivalent to USAG L4), and she trains 12h/week across three days.
While we’re still pretty new to the competitive gymnastics, from talking to other parents at the gym the hours for STEPS (regardless of age) seem to be STEP 3&4 12h, STEP 5&6 16h, STEP 7&8 20h. I’m not too sure on the hours of the higher levels?
For comparison, when my daughter did L3&4 Squad gymnastics (our equivalent to Excel) over the last two years, they trained L2 4h, L3 5h, L4 7.5h, L5&6 9.5h (Squad in NZ only goes upto L6).