That's brilliant sleeping for a nearly 6 month old! My nearly 6 month old sleeps normally around 7ish until like 7ish but will often wake up at 9 or 10 pm for a feed so it's more like 9 10ish until 7. It also depends how much they sleeping during the day think they should sleep like 12-16 hours in 24 hours
I think according to huckleberry 10hrs min or more is fine their age … My little boy is exactly the same! .. 6months on 27th x