Xavier, Packaging the official Debian package needs to meet many requirements. So we may need to be patient.
Although it may not be obvious for us to find the link in the opening web page of neovim, the upstream neovim folks release a functional Debian package nvim- linux64.deb at https://github.com/neovim/neovim/releases/ . If you need neovim 8.2 for ordinary PC workstation, you can install neovim using "dpkg -i nvim-linux64.deb". Good luck. I am using it on my PC without much issues. (I see some issues of updating AstroNvim probably due to its depending package issues.) Osamu