It does seem to work here, as per the character sheet, the inventory sheet, and the combat log.

Level 13 multiclassed monk has +3 armor from Transcendent Suffering : 1 base, 2 from power levels.

Combat log shows :

Armor :
+5 fine leather armor base bonus
+3 transcendent suffering
+1 fine quality
= 9

Penetration :
+6 base
+2 POTD
+1 level scaling
= 9

Armor vs pen :
9 armor
9 pen
= pen, 100% damage

Damage :
15.2 roll
+15% might
= 17.5 (rounded up to 18 in the combat log)

HP :
Total 269
After the hit 251
251 + 18 from the attack = 269


Looks good to me.

@nooby900 what is it you think does not work ?
Like, the game showing you have armor but still not taking it into account ?
The combat log and the damage numbers seem to add up here.

Do you have any more details ?

The buff effect is based on the paladin's zealous aura armor bonus, so it should work just fine.

it says in game that it provides armor but it doesnt

atm this mod does not work

dnd/pf monks gain a dodge bonus to AC, to avoid attacks, not DR, the equivalent would be a deflection bonus

and pillars monks can get armor by one of their modals, based on current wounds number, armor being different than AC

Isn't POE's equivalent to AC Deflection, as in dodging blows instead of reducing their damage?
Armor Rating in this game is closer to Damage Reduction in D&D.

Anyway, I'm just nitpicking at your description.
Thank you for the mod :)

The ability description changes to reflect the mod's effect, but my monk doesn't actually get the armor rating bonus.
I added to mod to a preexisting save, and I haven't retrained my character because people were reporting bugs about the retraining process.

Game version: 4.1.2.0047

Mods:
Free Action Weapon Swap - Arms Bearer (Nexus)
Level Cap 33: Purıst Version (Workshop)
Enhanced User Interface (Workshop)
This mod (Workshop)
6 characters in party (Nexus)