What is the difference between يقلل and ينكمش and يقلص ?Feel free to just provide example sentences.

ينكمش: a material get reduced in size by some reason or by itself
For example :
من الممكن لبعض الملابس أن تنكمش بعد الغسيل في حال عدم توافقها مع ظروف الغسيل
Translation :
it could be possible that some clothes shrink after washing in case they were incompatible with washing conditions.
يقلل: reduce/decrease something, it's mostly used with untouchable things, and too rarely to use it with things and materials which is touchable and visible
For example :
الأسلحة النووية تقلل فرص الحياة الآمنة
Translation :
Nuclear weapons are decreasing the chances of any peaceful life
يقلص : the same meaning, to reduce or decrease something, but the difference is that this verb is more common and used widely because it accepts to be used with untouchable and touchable
"real things"
For example :
إهدار الوقت يقلص فرص النجاح
Translation :
Wasting the time could decrease/reduce the success chances.
Also for example :
يمكن للعضلات أن تتقلص
Translation :
Muscles could possibly shrink.

example:
أبي يقلص القميص
Translation :
Dad reduces /cut off some of the shirt.
**I wish you find it useful.