If the addon is abandoned and you must use it, you would need to install an older, unsupported version of Kodi.

xbmc.python 2.1.0 is not a standalone software you download; it is a built-in application programming interface (API) version used by older versions of

Search for the addon name followed by "Kodi 21" or "Kodi 20" to find updated installation guides. 2. Downgrade Your Kodi Version (Not Recommended)

Because Python 3 is not backward-compatible with Python 2, addons requiring xbmc.python 2.1.0 on Kodi 19, 20, or 21. How to Fix the "Dependency Not Satisfied" Error