Switch manager is a centralised component to handle button pushes for your wireless switches. This includes anything passed through the event bus. The component relies on switch blueprints which is easily made to allow GUI configuration of your switches and their button pushes. This helps remove clutter from the automations.
I moved from Zigbee2MQTT to ZHA. And found that Ikea shortcut button E1812 is not supported.
This blueprint works for me: