When I was in my early 20’s and first on dating apps, ghosting was frustrating, but as I became more aware and empathetic, and learned that I am not entitled to the attention of others, that frustration became a lot less of an issue pretty quickly. This looks like it was developed by people who haven’t realized that and it feels pretty cringe. I doubt this will go anywhere.
They only list support for Windows and MacOS on their site. The answer is almost certainly no, it doesn’t work with Linux. People may reverse engineer it like they did with the Stream Deck or GoXLR devices, but don’t hold your breath. Your best alternative would be something like this: https://drop.com/buy/megalodon-doio-hot-swappable-rgb-30-keyboard?defaultSelectionIds=970727
EDIT: Or, you could build your own without the need of a raspberry pi using something like this: https://www.instructables.com/STREAM-DECK-KILLER-and-OpenSource/