[NAME] I don't think this problem is new to Windows 10. If you Google search 'windows 10 not showing safe to remove hardware message missing' you will find lots of information about the problem and lots of proposed solutions. A quick look at the search results shows this problem going back 4 years or more. It appears that some of the solutions worked for some but not for others, perhaps one will work for you.
I have been  having this issue. I get the issue fixed and it comes back. I do not like to just pull a flash drive out. It will damage them and they cost too much. It seems to be an issue in Windows 10 2004 but IDK for sure.  When I right click the icon down by the clock the USB flash drive icon. [IMAGE] I right click and select eject usually I get a message same to eject. Nothing shows no message. But if I click the message icon I see a message where it shows safe to eject. It just does not show me without looking.   Windows 10 Professional (x64) Version 2004 (build 19041.546)Install Language: English (United States)System Locale: English (United States)Installed: 9/1/2020 11:23:55 AM  
ejecting flash drives