Q.Lemon tree
Its been recently repotted with miracle grow citrus soil, as a root had broken the previous pot. However, now it seems to have yellow and deformed leaves. Is it overwatering?

Though yellowing leaves can be due to a few different reasons; in this case it is likely a watering issue.
Make sure you have an adequate sized container with proper drainage.
The container should be 1 to 2 sizes larger than the previous pot.
Water throughly but make sure soil is draining.
This article has more information.
https://www.gardeningknowhow.com/edible/fruits/lemons/lemon-tree-leaves-turn-yellow.htm