i have ZZ gem and it won’t multiply; its 3-4 yrs old

Question

I’ve repotted, changed position and tried it outdoors in shade and filtered light with no results

Answer 1

These plants prefer to be root bound and will grow very slowly after being transplanted.

No direct sunlight for your plant; they prefer shady location.
Give your plant more time and let it stay in its current pot.

https://www.gardeningknowhow.com/houseplants/zz-plant/caring-for-zz-plant.htm