It might be helpful if you explained what you tried and/or why you can't get it installed.

Have you tried the Linux installer?
https://sourceforge.net/projects/sweethome3d/files/SweetHome3D/SweetHome3D-7.1/SweetHome3D-7.1-linux-x64.tgz/download

Otherwise here are step-by-step instructions for Ubuntu 22.04: https://tutorialforlinux.com/2023/02/18/sweet-home-3d-ubuntu-22-04-installation-step-by-step/