Did the care taker provide suficent air flow and proper watering for six weeks ?

@nomen_nudum Probably not.

It looks like the plant has been using the stored energy and water from the lower leaves to survive. You mentioned some root rot. This could be the reason. If the roots can't do their job, the leaves will keep the plant alive.

I don't know if those leaves will continue shriveling or not. Chances are they will eventually fall off. The top leaves look much better. I think I would continue doing what you have done so far.

I like your soil choice. Less chance of over-watering with the gritty mix. The plant looks like it needs more light, too.

How long ago did you re-root it? Normally takes 3+ weeks to start growing roots and even then it can be very slow. Until then, health usually deteriorates a bit.

Water proportionately to the amount roots (if you haven't already). Pot is perhaps a bit big for a cutting so just be careful. =)

Hello Hanna. Ok, I'm going down a different line now....if it were mine I would cut it back to an inch or so above the point where the trunk divides. Re-pot in the same mix in a much smaller pot, water it in lightly as it already has roots (don't think it had all its roots chopped off from how I'm reading it???) place out of full sun, and wait. It should then grow branches from the old leaf scars and make a much sturdier plant than you will ever get from it as it is now as it's very spindly and etiolated from lack of light. Just my thoughts :)

Gill UK