I don't have much time to explain how it would work, but it would basically be like safari's tab switcher..
We'd have the ability to add cells, and set the content of the cells. This would be pretty complicated to code for both @Andreas_Hegenberg and the preset makers, but my main gripe for my AQT preset is that I can't recreate safari's tab switching in order to completely replace it.
When you add a cell via the code, the cell divides it's width by two and thus displays two buttons. If you add another one, it divides again and then you have three. Use safari's touchbar tab switcher for the best explanation!
Not sure how to allow us to keep track of the button adding and button actions, but yeah, not much time to think right now I need to go soon.