A repository for all Ubuntu Flavours on the Raspberry Pi To know if the package you selected works with your system,check if the one you downloaded is 32-bit or 64-bit. If it is 64-Bit, ONLY USE IT ON THE PI 400, PI 4, AND THE PI 3. If it is 32-bit, you can use it on the Pi 2, Pi 3, Pi4, and Pi 400. It is recommended only use the 64-bit version on the models 4 and 400, because the model 3 only has 1GB of RAM and a not-very-capable processor. Note that all flavours are based off of the latest LTS version of Ubuntu.
I am not responsible for any damage done to your system if you download and image the wrong package.