Mods that add passive perks/abilities

[lysna87]

Anyone know of any mods that add abilities or passive perks for doing things in game? Kind of like New Vegas would reward you for killing x number of animals or using so many rad-away you would get a rad resist buff?
I know there is one for PS4 called Strange Magic exploration sequel, that unlocks recipes and perks (better damage resist, movement speed etc) as you clear dungeons, accumulate kills or spend time in a faction. It's not available on PC, unfortunately.

[DPMR]

This one comes to mind. Ordinator - Perks of Skyrim

https://www.nexusmods.com/skyrimspecialedition/mods/1137

[Ankou]

Achieve That SE
https://www.nexusmods.com/skyrimspecialedition/mods/12708/

Now, the old version I was using in like 2013 or something did exactly what you seem to want. (For example, spend x number of days in Skyrim, get a bonus to your frost resistance. Kill x number of vampires, get a bonus to disease resistance. It did get quite overpowered IMO.) The new one gives you points for doing stuff which you can redeem for... honestly much more boring looking but probably better balance bonuses.
But I seem to remember the new version had an option to restore how bonuses worked in the old version, so maybe check it out? (I could be misremembering given how long ago that was however,)

And yeah, Ordinator. It's a perk overhaul but it's a very good perk overhaul that adds a lot of interesting abilities to the perks.

[Lothic]

https://www.nexusmods.com/skyrimspecialedition/mods/1036/
https://www.nexusmods.com/skyrimspecialedition/mods/19564
somewhat doing it

adds new perks outside of the perk trees (so compatible to all perk overhauls like ordinator)

with the second mod you can get the perk items as random drops; it's not exactly after X kills like you asked