Belonging to a Sufi order is not a religious obligation or an obligatory act (farz or wajib) according to Islamic core teachings (the Quran and Sunnah). Sufism and its orders are more related to the spiritual practice of Islam, aiming for a deeper understanding and practice of the faith through a mentor (murshid). However, following a Sufi order is not mandated by the core principles of Islam.
Being a member of a Sufi order is a personal choice for those seeking spiritual guidance and training, and it is not considered a religious duty. What is most important in Islam is adhering to the commandments of Allah and living with good character. Not following a Sufi order does not mean neglecting religious duties.