They exist already@Ayan Barat
Edit: Not exact same configuration. We envisaged a contra rotating coaxial common shaft for two electric motors. So that rigid blades could be more closer.


6X12 PRO L 170KV Coaxial Contra-Rotating drone arm set
1:5-7kgF/rotor Max thrust:15kgF/rotor, 2: Neat Cable arrangement and easy to install. 3.Ultralight weight for industrial multirotor: mapping,aerial,inspection,firefighting,military,search and rescue,and more. 4. Field-Oriented control.

Weight, size advantages can be seen in above arrangement if compare with conventional single rotor 6.8 kg model here

U7 V2.0 KV490 heavy-lift multi-rotor motor | T-MOTOR®
T-MOTOR U7 V2.0 is designed for high-thrust drones (10-24 kg) used in aerial photography, delivery, and agricultural protection.
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