uploaded images look too dark on mobile screen vs laptop

Hi,

I have noticed lately that some of the images I upload look much darker on mobile screens compared to the laptop screen. It does not happen to images that was photographed with a digital camera and then uploaded, but it happens to photos that was originally photographed with a medium format, then scanned and edited in photoshop before upload to wordpress. I have compared with other mobile screens and laptop screens and the same problem seem to appear. I have saved the image as sRGB, is there anything else I should be doing? Here is a link to the website: https://eyesasbigasplates.com

Very grateful for any pointers to what I am doing wrong.

Many thanks,
Karoline Hjorth.