To legally obtain Adobe Photoshop 2020 v21.0.1.47 (or newer):
Check via:
Help → About Photoshop
Should display:
Adobe Photoshop Version: 21.0.1.47 20200210.r.48 2020/02/10: 1156284 x64 Adobe Photoshop 2020 v21.0.1.47 Multilanguage -...
The presence of multilanguage options in Preferences → Interface → UI Language confirms the multilingual version. To legally obtain Adobe Photoshop 2020 v21
This patch retains all major features introduced with the initial 2020 release: Adobe Photoshop Version: 21