Minecraft Bedrock Animals

I think it would be cool if there could be a group of new animals in each biome(could be a side project for how long it might take) and all new animals could be tamed and ridden or just tamed and stick around your land and you.(they won’t wander more than 30 something blocks from the nearest player built object or a new block that can be a “fence” in a way) and if not new animals add a code to the current animals for the same not wandering around idea. There could even be a creature like the iron golem that you could make into an army like wolves do if anything hurts you or you hurt it, the creature attacks.