The midfielder, a graduate of City’s famed Academy, made his first team debut against Southampton in the Carabao Cup in October 2019.
Tommy – the grandson of City legends Mike Doyle and Glyn Pardoe – has since gone on to make seven first team appearances in total.
The 19-year-old also captained City to 2020 FA Youth Cup and 2020/21 Premier League title success.
Now he will further his experience with a season on loan playing with the Bundesliga 2 outfit.
Everyone as the Club wishes Tommy the best of luck for the rest of the campaign.