Help with Xanthoxylum piperitum

I've had this bonsai for I think a year now and it was doing great! (second tree)
After a while I kind of forgot about it or thought it would still be fine don't remember exactly.

The leaves started wilting so I started watering it again but the leaves wouldn't turn back to its normal shiny green state.
All the leaves started crumbling and they were 100% done.. so I removed all the leaves (this is where I think I screwed up)

For the past 2 months I've been giving watering correctly, fertilizing it, and re potted it in Akadama + a mix of zeolite, lava granulate and pumice
I fertilize it once every 2 weeks.

I cut one of the branches to see if the tree was still alive and it was still green.. but I can't seem to get a single leave to re appear on the tree :blink:
Is there anything that I'm overseeing?

Roci wrote: After a while I kind of forgot about it or thought it would still be fine don't remember exactly.
... giving watering correctly, fertilizing it, and re potted it in Akadama + a mix of zeolite, lava granulate and pumice
I fertilize it once every 2 weeks...

Don't take me wrong, but none doesn't "forget about it" and then "start watering again".
The tree was already very weak, and then you...
Repotted it!
A perfect recipe to kill a tree in a pot.
Sorry.
It will be difficult, but who knows? Wait a little longer, don't overwater it, keep it in dappled shadow and let's hope for the best.

Roci wrote: After a while I kind of forgot about it or thought it would still be fine don't remember exactly.
... giving watering correctly, fertilizing it, and re potted it in Akadama + a mix of zeolite, lava granulate and pumice
I fertilize it once every 2 weeks...

Don't take me wrong, but one doesn't "forget about it" and then "start watering again".
The tree was already very weak, and then you...
Repotted it!
A perfect recipe to kill a tree in a pot.
Sorry.
It will be difficult, but who knows? Wait a little longer, don't overwater it, keep it in dappled shadow and let's hope for the best.