I’m not the previous poster but I do think it’s AI for a few reasons.

Visual distortions on some fine elements such as the top of the plant in the lower left.

A number of bird shapes that don’t make any sense.

The reflection in the water also doesn’t really make sense - there’s nothing with that color pattern it could be reflecting.

There’s an odd green object that looks like an alien skull or something on the rock over on the right.

Maybe it was generated partially with AI or cleaned up by a human artist who worked on it for a while, but I also thought it looked like a computer image. But overall it’s a nice effect and an interesting style.

The trees on the right have artefacts on the lit parts. The sky has these nonsensical white lines that you would usually associate with the underside of clouds, except they’re not attached to any clouds. The pink fluffy clouds on the right overlap each other in weird ways.

And I think what made me immediately think AI on a first look is the strange colours. The top half uses a very warm, low-contrast palette but then you get to the bottom and suddenly there’s tons of green and blue. Not to shit on OP but it’s a very “beginning artist” choice for a work that is clearly not made by a beginning painter.