Step-by-step – OpenSCAD Installation in Debian Bullseye

Installing

2. 2. Setting Up Flatpak

   How to Install Flatpak on Debian 11

   Flatpak Debian 11 Installation Guide

   Flatpak Debian 11 Setup

3. 3. Installing OpenSCAD Flatpak

   Then to Install OpenSCAD Flatpak App on Debian 11
   Simply play:

   flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

   For further Insight see the Flatpak Official Documentation.
   And after:

   flatpak install https://dl.flathub.org/repo/appstream/org.openscad.OpenSCAD.flatpakref

   The Flatpak App Setup do Not need the sudo Command because then it Runs confined into a Sandbox.
   However you’ll be Prompted to Authenticate with your User or Admin Pass.
   Then Confirm the proposed Setup with ‘Enter’ and wait until the App is Downloaded and Installed.