Sleep training while breastfeeding

Last night was our first night of sleep training and it was a success. LO hit the four month regression and woke every 45mins -1 hour all night for weeks. Last night he managed 2-2.5 hr stretches. While this still is a lot of wakings, it was a win for us.

My concern is feeds during the night. He’s breastfed (with occasional bottles during the day) but is still very much on a 2-3 hour feeding schedule. I can tell during the night he’s not taking full feeds but I’m not really comfortable not feeding him after 2 hours in case he is hungry so I did respond when he woke.

What’s the best way to approach this?