When I try to "save as" or "save a copy" in JPEG format I notice the "layers" option is gone.

This seems to have just started within the last two weeks. I must have updated Photoshop and not realized it and now I'm screwed. When I try to "save as" or "save a copy" in JPEG or PNG format I notice the "layers" option is greyed out in the save dialog box. PS simply combines all the layers into one and I end up losing shadow, depth, saturation, sharpness, etc. In other words I can't save the picture EXACTLY as I made it. I tried using the " Enable Legacy Save As" & "Do Not Append Copy" and NOTHING will work. I can't save a PSD to EXACTLY what I want as a JPEG or PNG so WTF good is Photoshop to me at this point? This is BEYOND frustrating. Any help from the big brains out there wopuld be greatly appreciated.