Refusing 2nd nap

For the past two weeks my almost 10 months old had been refusing to take his 2nd nap, his nap schedule has been, first nap at 9-11, then take his 2nd nap at 2-3 or 2:30-3:30. I can not for the life of me get him to take his 2nd nap, he’s been waking at 5am and I’ve been following taking cara babies for early morning wakings and keeping his morning nap the same 9am, some days he’ll sleep 1 hour some days he’ll sleep 2.5 hours, but it doesn’t seem to matter he still refuses his 2nd nap, he’s beyond exhausted by bedtime which is between 6:30-7, I feel like I’m stuck in this cycle and I don’t know how to break it, I’m so frustrated!!! I know he’s kit ready for one nap because he wakes so early I barely get him to 9am. I just don’t know what to do anymore, I feel like I’ve tried everything, anyone have any suggestions or advice?