Does Elements 2020 support Topaz Denoise AI

I don't have Topaz Denoise, but I do have Adjust AI and Sharpen AI which both work in Elements 2021. 

The Topaz installer creates a plug-in for both 32 and 64 bit operating systems and I think it sometimes gets confused as to which file should be installed in Elements.  So, look for the Denoise plug-in file which should have a file extension of .8bf.  It will probably be in a location similar to the following: 

C:\Program Files\Topaz Labs LLC\Topaz Denoise AI\PS_Plugins_x64\

Make sure you choose the folder with x64 in the name.  The denoise plug-in must also have x64 in the name.  The Sharpen plug-in is named: tltopazsharpenaips_x64.8bf so I'm guessing that you are looking for a file called tltopazdenoiseaips_x64.8bf

Copy this plug-in file to the following directory: C:\Program Files\Adobe\Photoshop Elements 2020\Required\Plug-Ins\

It should then show up under the Filters menu in the Elements 2020 Editor.

[Edited to reflect the correct path for Elements 2020.  I just added the plug-in to my 2020 installation.  Obviously, the Topaz installer did not find it by itself.]