I wanted to create this and needed a place to mount the RTC
https://learn.adafruit.com/macropad-2fa-totp-authentication-friend
The author remixed this model.
I added a slot on the side and more room for the stemma qt to route to connect the rtc module to the macropad. I also added two mounting places for the Adafruit DS3231 Precision RTC https://www.adafruit.com/product/5188
Used for this
https://learn.adafruit.com/macropad-2fa-totp-authentication-friend