On installing SQL Server Management Studio v20, the menu items for Poor Man's T-SQL Formatter are gone.
Things worked fine in v18 after following the advice here: https://stackoverflow.com/a/72996345/4830285 Not so in v20.
How do I use the tool in SQL Server Management Studio v20?

I got it working this way.
Install SSMS 17.9.1
Install SSMS 20.x
Install PoorMansTSqlFormatter
copy PoorMansTSqlFormatterSSMSPackage.pkgdef to C:\Program Files (x86)\Microsoft SQL Server Management Studio 20\Extensions (located at C:\Program Files (x86)\Microsoft SQL Server Management Studio 17\Extensions or C:\Program Files (x86)\Microsoft SQL Server\140\Tools\Binn\ManagementStudio\Extensions)
Re-open SSMS 20.x and it should appear under Tools. (you can now fix the shortcut keys CTRL-K CTRL-D)
Uninstall SSMS 17.9.1
https://github.com/TaoK/PoorMansTSqlFormatter/issues/283#issuecomment-1493274817