Villager Golem Healer Add-on 1.21+

Mod Villager Golem Healer is a way to turn village defense into a real fortification in Minecraft. In the game, a Villager will appear who heals Iron Golems through interaction with a special Mini-Golem and can receive regeneration from Flowers.

When an Iron Golem is under attack, the mob will summon a Mini-Golem that will heal the Iron Golem. The Healer himself will also heal when near a Poppy. Additionally, the mob can sell you useful items.