Early wakes 21 month old

[Swirls346]

My son keeps waking at 5am (he's 21 months) He's wide awake and there's noway he's going back to sleep. He has a 2 hour nap 11-1 (ish) in the day. Last night bed time was 9pm. I've tried earlier bed times - so the day before he napped 10-12 and went to sleep at half 7. He did this is the summer for about 10 weeks but I could understand because it was light at that time. It then went back to waking at half 6 /sometimes 7 if we were lucky.
I tried capping his nap to an hour but made absolutely no difference apart from that he was miserable all day.
Do I just need to accept this is his wake him? I can't remember the last time I wasn't exhausted and drained. There's never enough time to get anything in the house done.

I have a 22 month old waking at 5. He always used to wake at 5 but then we had a few months of him waking at 7 during the summer and thought we were on track but for the last week or 2 we’ve been back to 5am. He’s wide awake so we give him breakfast and he watches tv but our other 2 kids sleep until at least 7.30 so it’s a spanner in the works! He goes to bed at 7pm, and we’re lucky if we can get him to nap for 20mins in the day so he’s always overtired and having meltdowns, it’s exhausting I know