Its kind of hard to say, scoring can vary regionally, there are also gyms that do higher hours, gyms that really focus on nailing those compulsory routines etc. My kid was older than that when she did level 3 and scored 33s her first year and 35s second year at that level but there were kids at other gyms getting 37s/38s not entirely sure of their ages though maybe they were a bit older than 6?
Placements can better show how they are doing compared to local peers. All in all though I would say average to above average! And way better than my kid did at that level.