The 10 Chibis are all found in the main area, with the exception of one that's only accessible after you beat the boss
They are distinctive by the sound they make when you're near them, which is Pagan reciting lines from Far Cry 4 in a high-pitched voice.
https://mapgenie.io/far-cry-6/maps/pagan-controlI used this to find the collectibles. You can click the stuff you don't want to see (like chests), to take them off the map and make it a little clearer.