Yes, TXT, also known as Tomorrow X Together, is part of the HYBE family. They are managed by Big Hit Music, which is one of the labels under HYBE Corporation.
HYBE Corporation was originally called Big Hit Entertainment before it changed its name in 2021. Big Hit Music is still a part of HYBE and is responsible for managing artists like BTS and TXT. This means TXT belongs to the same company that helped BTS become world-famous.
TXT debuted in 2019 with their song “Crown” and quickly became popular. They are known for their talent and hard work, and they have achieved success both in South Korea and internationally. Since they are under Big Hit Music, which is a subsidiary of HYBE, they are considered part of the HYBE family along with other groups like Seventeen, Enhypen, and Le Sserafim.