How to Merge Layers with styles (blend option) without losing de effect?

Hi everyone!! I have an issue trying to achieve an effect in a photography, using the layer style with blending options.

The one on the left is how it's supposed to look, when I merged all the layers and when I exported it changed. The photo on the right is different, the effect is not the same even if I don't merge the layers and just export them, the photo keeps changing.

If anyone knows a solution I will be very glad, these changes are ruining the effect of my photo and making me very frustrated.

This is how it looks in photoshop, thank you for helping!!