for du postpaid connections, you can use their Multi-SIM product. It allows data from the main mobile line to be shared on 5 different devices. You will need to order additional SIM card for each device you want data on. Also each SIM card will have a monthly rental of AED 25 +VAT. You can find more about it here:

https://www.du.ae/personal/mobile/add-ons/multi-sim