This is the Notion Desktop for Linux. It is available as a Flatpak and can be run on nearly any Linux machine regardless of distribution. To install, paste the following into a shell:

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Install Notion (this will also prompt to add the Flathub runtime remote)

flatpak --user install --from https://app.linux-packages.notion.com/notion.flatpakref

Updates arrive via flatpak --user update, GNOME Software, or KDE Discover. If you prefer to add the repository as a named remote instead, use notion.flatpakrepo.

notion.flatpakref · notion.flatpakrepo · GPG public key

These are the permissions Notion Desktop requests, along with an explanation why. You can disable them if you are uncomfortable with granting them to the application, and that will disable the stated feature. The rest of Notion will continue to work as expected. For example, flatpak override --user com.notion.app.desktop.notion --nofilesystem=home turns off home-folder access.