Can I enable reporting cluster without doing binding? [URGENT]

Hello to all,

I have a problem relating to cluster reporting: I have a device, Window Covering Device, which acts as a router and I want to connect it to Alexa, which acts as Coordinator so I have no control over its messages.

What I observe is that the binding request is not sent by Alexa so the automatic reporting of the reportable attributes in the Window Covering cluster is not enabled: the attributes are ZB_ZCL_ATTR_WINDOW_COVERING_CURRENT_POSITION_LIFT_PERCENTAGE_ID and ZB_ZCL_ATTR_WINDOW_COVERING_CURRENT_POSITION_TILT_PERCENTAGE_ID.

It is a very serious and urgent problem, so i want to know:

1) If someone had faced a similar situation
2) Is it still possible to enable reporting by sending a particular message from the router that I'm building? I had tried with the function that I found in this forum, zb_zcl_put_reporting_info, but it didn't work.

Thank you very much and have a nice day.