In my case it is like in the 1st picture. (This larger button)

Yes they are you can give each button its own colour Prism, for example, is a favourite of mine with animated buttons that light up when you press a button.

Wired: https://de.steelseries.com/gaming-keyboards/apex-pro-tkl-2023 But there is also a wireless version: https://de.steelseries.com/gaming-keyboards/apex-pro-tkl-wireless-2023

This keyboard has a DE layout.