As of right now, there's 5 types of zooms:
1)Spectre, Stinger (1.15x)
2)Vandal, Phantom, Bulldog, Ares, Odin (1.25x)
3)Guardian (1.50x)
4)Marshal, Operator (2.5x)
5)Operator Double Zoom (5x)

Now in order to achieve your 1:1 sens ratio with The Operator/marshall you have to set it to 0.747(which feels like let's say 0.81 zoom sens in cs or widowmaker 0.38 in Ow even tho im not 100% on the last cause i dont really play ow that much) as documented here: https://www.reddit.com/r/VALORANT/comments/fy5ei7/ads_sensitivity/

The problem then arise when using Rifles or other zooms where to have your 1:1 sens you need for example 0.908 on the smgs and 0.87 for the rifles.
The game was marketed with "Where Precise Gunplay Matters" but we still can't have such a Useful option?
Im used to 0.81 zoom sens in Cs, i use 0.747 so i can use the operator confidently whenever needed but my muscle memory gets messed up when i use for example the Ads on the bulldog, which, in a competitive fps game shouldn't really be the case. Also Pardon my english if possible, is not my first language.