The Zigbee button will not show any entities, you need to go to Developer > Event and listen to zha_event and configure manually, or you can try to find a blueprint associated with your device.
As per what mightybosstone has mentioned, the device sends ‘events’ rather than having entities.
You can still use it in the normal way but create triggers based on 'event’s.
eg:
trigger:
- platform: event
event_type: xiaomi_aqara.click
event_data:
entity_id: binary_sensor.switch_your_wireless_button
click_type: single
I can only give you what I have experienced.
There are conversations that z2m supports more devices than zha. I don’t have many devices, and all apparently are supported by zha as I have not had issues pairing the devices I do have. zha is built into HA so I went with that as my decision.