yeah, it's possible.
but it's damn hard or impossible to pull off if the road surface is clean.
the brakes on a bicycle are appalling in comparison to motorcycles.
that and you don't want to put the weight low, you want it to go as far back as possible.
I've only ever did a stoppie on a bike while going down hill. I've never managed to pull it off on flat ground. How are you doing it? :-/
You want it both low AND far back. The force required to lever the bike over the front axle is dependent on both angle and fulcrum arm length.
How? Squeeze the front brake progressively and continually, just like on a motorcycle. :shrug:
KeS