Preview looks completely different than my design

Hi there, i've been using photoshop for a while now and i've never had a problem like this before. I'm using version ( 24.1.1 ) of the creative cloud photoshop and i'm on Windows 10. I designed this liquified poster and added some adjustment layers and gradients. However, when I go to export the image as a png, the preview looks completely off. When I was trying to figure it out before people were saying I needed to change the document profile colour but that never did anything. I would just like to know what I can do to have export look identical to what I designed. Thank you