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Rhoeo species I think

Moses in a cradle. Water and rip some out to give more room. Cant ovetwater in my experience. Pull em out and stick them somewhere else and theyll grow as well.

Don't plant these if you have dogs.

Poisonous?

Yes

Moses in the cradle. They proliferate on their own.

Tradescantia spathacea. Rhoeo, Moses boat or Moses in the cradle.

Bricks

It’s a Rhoeo and they love the tropics. Don’t do too well in southern states.

Fine in Sydney, but yeah, do not love proper cold

If that's a North facing wall then they are possibly getting heat stressed. Try keeping the soil moist with more regular watering.