Out of curiosity, how long are your nursing sessions?

I know every baby is different but just wanted to poll the crowd to see if there were any patterns! My baby is 3 months old today and nurses for about 20-25 minutes each session. He always seems satisfied after but because I’m a crazy worried FTM I sometimes offer him a couple ounces in a bottle after and he always takes it. Still wrestling with the constant “is he getting enough” question regardless of healthy weight gain, dirty diapers, etc.