CLOSED

You must add pillgers with beds, a bell, and some profession blocks which theyll summon iron golems 

you need a lot of villagers

Works for me. Are you sure you are doing it right?

[MCPE Helper] LateLag on Bedrock, iron golems also spawn in villages having at least 21 beds and 10 villagers, in a 16×6×16 volume around the village center defined by a bed, a bell, or other meeting point. on Java, iron golems spawns is based on villager gossip. Not sure if I'm right.

I'm not sure why it is closed?