Delphi 10.2 Tokyo patch, version

In filename radstudio10_2_2_esd_2004.exe ( for Delphi 10.2 Tokyo),   what "10_2_2" indicates?  Also I did not see update check under any menu (autoupdate automatically apply patches).  So how will I know patch level I am at ? How to get list of all patches and order in which these needs to be applied?