m16 R1, issue with WD15 docking station

Trouble connecting Dell WD15 docking station with Alienware m16 R1. It either detects monitor or keyboard and mouse wont detect both. Dock works fine with my other laptops ( HP Omen 15 2020 and Samsung Galaxy book 2 pro 360). Both these laptops also works fine with 2 monitors but m16 R1 can't even detect 1 with accessories. Is there a fix? I already installed network driver of WD15 and also update Alienware drivers too Bios is also up to date.