About image inclusion in alert notification via Webhook url

Grafana Alerting
1

Grafana version - 10.1.5
Grafana-image-renderer plugin version - 3.7.2
Using Grafana managed alertmanager

I am using webhook url configuration to connect my slack to get alert notifications on the channels.
But I am not getting panel images in my alerts.
Can anyone help me fix that?

NOTE:

  1. I am getting panel images on using Slack Api access token in this version.
  2. For grafana version 8.5.0, I was getting panel images in alerts via Webhook urls too.