It's normal if child is gaining weight and if child is active.

babies spend most of their time sleeping, this is normal

As baby is active and gaining weight, no need to worry.

No need to wake up the child. Child at this age can maintain body sugar throughout night so need to wake up the child. Also urine frequency is good and weight gain is also good so no need of extra feeds. Waking up the child now for feeds at night will later on lead to habit of waking up at night or disturbed sleep at night and that can continue till 2 years so better to continue the same and not disturb the child's sleep pattern.