I had an avocado tree last year that got sunburnt so started over in the spring with this one. It has had healthy green leaves for ~2 months but now some are yellowing and dropping off.

I have it shaded. It gets morning sun and then filtered afternoon and evening sun.

The soil is naturally a clay/sand mixture but I filled the hole with topsoil and sand.

It has been raining a lot lately but the yard drains after a dry day or two.

I do see two fungi sticking out of the ground nearby. And I have seen ants but not on the tree.