My 3 month old only sleeps 11h a day

Does anybody else’s 3 month old sleep much less than recommended? Mine only sleeps about 11h a day. I read everywhere they should sleep 15-16h at that age. He doesn’t sleep through the night yet but wakes up every 2.5-4h to feed. I try to put him down by 7pm but he often only falls asleep by 8 even if I start feeding him and getting ready by 6pm or even earlier. I try to put him down to nap every 1.5-2h during the day as well. He usually naps 1h in the morning and 45min in the afternoon. He used to do a 2h nap during lunch time but has stopped doing that this week and sleeps much shorter now. That is since we started using a swing to let him sleep at night. The swing prolonged his nighttime sleep stretches but now he doesn’t nap well anymore during lunch. Sigh.

Any suggestions?