Opecity mask is not working in Adobe Illustratior 28.1v

I am Applying as we applied for previous versions Opacity mask is not working in Adobe Illustrator 28.1v Update,  I do the same process, The image Layer behind the black-and-white shape and gives it Opacity Mask in the Tranceperancy tab but it hides everything as it should be that Black area will hide, and the white will display something like that.

Kindly solve this ASAP as this is a very IMP tool

Thanks