I configure bindings through Zigbee2MQTT. You can view the bindings in the switch configuration, where you can also update or remove them. I use Zigbee2MQTT to handle low-level Zigbee tasks such as pairing, binding, creating groups, setting up scenes, and configuring devices. Most of these things are stored within the devices and work without the coordinator/ha-server.

The configurations you set up in Zigbee2MQTT are synced with HA and can be used there as well. I use the options provided by HA for higher-level tasks, such as automations, custom sensors, statistics, and more. Everything I configure there will not work when the server/coordinator goes down.