use minecraft:environment_sensor with the has_tag filter, then add a component group with minecraft:damage_sensor and set all cause of damage to be false
#How to make an armor stand invulnerable when it has a certain tag?
cold mantle
cold mantle
The environment sensor is invalid
You should see one from vanilla mobs as a reference
odd cosmos
use `minecraft:environment_sensor` with the `has_tag` filter, then add a compone...
You cannot make Armor stands invincible.