Far Cry 6 Pagan Control DLC has 21 Pagan’s Mind Locations. Finding all explorable Locations unlocks the Enlightened Monarch trophy or achievement.
They are basically side activities, different types of open world events. These include the Safe Houses, Trials, Weapon Challenges, Mind Sequences, Main Objectives. They spawn on any Mind Level from Level 1 to 5, all are in fixed positions. None of them are missable, you can collect them at any time and in any order.
For the trophy you only need to find them, not complete them. Meaning you must make them show up on your map with a blue icon. You do NOT need to complete them. They do not need to be collected in one life either, it saves across multiple playthroughs. If you die you don’t need to find them again. Once found they stay marked in all future runs.
The Royal Palace (endgame area where you exfiltrate in north-east of map) counts as 1 location, then the 3 main objectives (Mask Pieces) are marked by orange icons, and 17 side activities are marked by purple icons (they turn green when completed). The trophy pops right away when going near the last location.
In the Menu under Scoreboard you can see how many you completed in the current run. But as noted, completing them isn’t needed for “Enlightened Monarch” trophy / achievement, just need to get them to show on the map.
Location #1: Trial – Contemporary Art
Location #2: Armory Challenge – Bow
Location #3: Delusion: Sound and Fury
Location #4: Safe House – Lakeside Safe House
Location #5: Armory Challenge – Machine Gun
Location #6: Armory Challenge – Shotgun
Location #7: Trial – Contemporary Art
Location #8: Armory Challenge – Grenade Launcher
Location #9: Safe House – Country Safe House
Location #10: Armory Challenge – SMG
Location #11: Delusion – House on Fire
Location #12: Armory Challenge – Rifle
Location #13: Trial – Contemporary Art
Location #14: Sniper Rifle – Armory Challenge
Location #15: Safe House – Mountain Safe House
Location #16: Armory Challenge – Auto Pistol
Location #17: Delusion – Thicker Than Water
Location #18: Memory – For King and Country
Location #19: Memory – Playing God
Location #20: Memory – Rewriting History
Location #21: Royal Palace (Endgame Area / Exfiltration Area) – this is only accessible after finding all 3 Mask Pieces (Main Objectives)
For everything else needed for 100% completion, check out the full Far Cry 6 Wiki & Strategy Guide.