the search icon conflicts with the image of the file.I want to restore the style of the search icon.I try to set the icon theme, but it didn’t work.I don’t know what to do.I look forward to your help.enter image description here

I am running latest OS on an M3 MacBook Pro. I see an icon, Capital A in white over a rounded blue background over, beside, or near every text input filed, regardless of the application I am using.