There has been many new updates that altered the sensitivities and magnifications of various sights and scopes in the game, especially in the last patch a month ago - I noticed that on this site the last update was 2020, so an update would be appreciated!

Everything was updated and verified about a month ago, the updated date you see is in the game info is for that specific aim. If you check for instance the Walther MRS reflex sight you'll see that it was added 22nd of July, and VOMZ Pilad 4x32 was updated on the same day.