[wsnipex]

are you using v18 or v19? It is correct on v19 builds:
$ lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 20.04.1 LTS
Release:    20.04
Codename:    focal

$ head -1 /usr/bin/kodi-send
#!/usr/bin/python3

$ dpkg -S /usr/bin/kodi-send
kodi-eventclients-kodi-send: /usr/bin/kodi-send

$ apt policy kodi-eventclients-kodi-send
kodi-eventclients-kodi-send:
  Installed: 2:19.0+git20201103.0450-f60adf0651-0~focal
  Candidate: 2:19.0+git20201103.0450-f60adf0651-0~focal
  Version table:
 *** 2:19.0+git20201103.0450-f60adf0651-0~focal 500
        500 http://ppa.launchpad.net/team-xbmc/xbmc-nightly/ubuntu focal/main amd64 Packages
        500 http://ppa.launchpad.net/team-xbmc/xbmc-nightly/ubuntu focal/main i386 Packages
        100 /var/lib/dpkg/status
     2:19.0+git20201027.0300-ac48ff40d0-0focal 500
        500 http://ppa.launchpad.net/team-xbmc/xbmc-nightly/ubuntu focal/main amd64 Packages
        500 http://ppa.launchpad.net/team-xbmc/xbmc-nightly/ubuntu focal/main i386 Packages
     2:18.6+dfsg1-2ubuntu1 500
        500 http://at.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        500 http://at.archive.ubuntu.com/ubuntu focal/universe i386 Packages


for v18: Kodi uses and needs python 2, which commonly means /usr/bin/python.
I'm not going to push new packages because of this, just fix it on your system.