The 2021 Joint EuCNC & 6G Summit, builds on putting together two successful conferences in the area of telecommunications: EuCNC (European Conference on Networks and Communications), in its 30th edition of a series, supported by the European Commission; the 6G Summit, in its 3rd edition, originated from the 6G Flagship programme in Finland. The conference is sponsored by the IEEE Communications Society and by the European Association for Signal Processing, and focuses on all aspects of telecommunications ranging from 5G deployment and mobile IoT to 6G exploration and future communications systems and net1works, including experimentation and testbeds, and applications and services. Within this event, 1 paper, 1 special session and 1 workshop were held by TeraFlow and its consortium.