They're mostly eyes, which don't fossilize well.
Shitty Ask Lemmy
its like r/shittyaskreddit except its lemmy
No bones
There are! It's just that they're buried in the heavens and historically speaking the sky is really hard to dig up.
Because they're not physical beings and they don't die
No body, no crime.
Most of them are still alive. And if they die they don't leave bodies behind. The magical goo they are made out of get absorbed back to their creator.
What do you mean? I was watching a documentary about one just last week.

Here you go

'Cause they can all dance on the head of a single pin. So they're really really tiny. Also finding the pin is really hard.
Let me guess, the needle's in a haystack?
No no no no no. We're looking for a pin.
It might be in a hay stack or a hay rick or a hay bale...
Don't be obtuse.
I just had to cross off this problem.
Has enough time passes since the uprising to allow them to become fossils?
Also, think about how there were millions of years of Dino's, yet there are so few skeletons.