My son won’t nap in the day!

My son is 2 in a few days and has decided to refuse to sleep in the day, previously he was sleeping 2 hours at around 10:30/11 everyday and goes to sleep at 7/7:30. Lately he is refusing to sleep and is so tired that he is miserable all day! He has always napped in bed and occasionally in the car or pram we have tried all of these and he is physically stopping himself sleep. Would love some advice on what we can do? I’m confident he is not ready to give up a daytime nap so I’m looking for different ideas and things I can do to help with the daytime sleep. Thanks in advance!