Proprietary Mac app...? Maybe you are looking at a different "qmk"? You can do all of this without any need for additional runtime software (apart from build e

Proprietary Mac app...? Maybe you are looking at a different "qmk"? You can do all of this without any need for additional runtime software (apart from build environment to build and make changes obv) directly in the keyboard/pad with the mentioned qmk-firmware. You can build the pad from scratch, buy a kit, or a prebuilt (like the linked example). https://qmk.github.io/qmk_mkdocs/master/en/feature_unicode/ https://qmk.github.io/qmk_mkdocs/master/en/feature_unicode/ If I have it working in Alpine, Gentoo, NixOS, Guix, Debian, Mint, Arch and Rocky out of the box I fail to see why Ubuntu would be different ;) Another great option is zmk, which has better support for Bluetooth if that's your thing.