Possible / how to connect Aqara sensor with 3rd party hub

No, you can not do that. You can not connect two Zigbee Coordinator to the same Zigbee network, (Dirigera hub is an appliance with its own propriatory Zigbee Gateway software application and a built-in Zigbee Coordinator radio module, and the same goes for all other Zigbee gateways/hubs/bridges). Read this introduction to ZHA and Zigbee → https://www.home-assistant.io/integrations/zha#introduction and https://www.home-assistant.io/integrations/zha#limitations

Tip is also to follow → https://community.home-assistant.io/t/guide-for-zigbee-interference-avoidance-and-network-range-coverage-optimization/515752