I believe the ADS calculation of destiny 2 to kovaaks is incorrect.
The maximum ADS sensitivity in destiny 2 isn't even possible in Kovaaks. 5 sensitivity in destiny 2 is 0.5, which is multiplied by the Hipfire sensitivity. Somehow in kovaaks this is 0.35, which is 0.35 multiplied by 1 or whatever your hipfire sensitivity is.
My ADS and scope conversion was MDV/MDH 0% with 70-100% scaling depending on my sensitivity in destiny 2.
I also tried MDH 100% with the scaling number based on my destiny 2 sensitivity.