Not directly. The UAE has announced that all UAE federal government entities will be transitioning to a four and a half day working week, from Monday to Friday lunch-time. Importantly, it has also been announced that all schools will operate from Monday to Friday.
Strictly speaking, the change does not specifically apply to the private sector. The new UAE labour law (Federal Law No.33 of 2021), which comes into force on 2 February 2022, states that all employees are entitled to one rest day per week. Employers are free to choose when that rest day is and the UAE federal government's announcement does not change that. In other words, it is open to private sector employers (except schools) to continue to operate a Friday/Saturday weekend.
That said, we anticipate that most private sector companies will change to a Saturday/Sunday weekend to align with the UAE federal government. It would not make much sense for businesses to remain open when all government authorities, ministries, courts and schools are closed.