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.
