Hello Rick, welcome.
While zigbee uses a local wireless protocol, it’s best to migrate your zigbee devices to Homey (meaning starting from scratch).
But that’s only my opinion.
You can ask in the Amazon Alexa app topic if your zigbee devices will get published and become available for Homey, when adding your Echo to Homey (sort of similar to Philips Hue).
In that topic, the app developer reads along.
