After a long time of investigations (~2 hours), I found an easy approach. For Caleb’s answer, I didn’t understand how to invite a Bot to the channel. Hence, I am posting this answer.
Go to your Slack Channel and type the following as a message.
/invite @BOT_NAME
Eg: If your Bot name is SRE Incident Manager the command would be as follows.
/invite @sre_incident_manager
As soon as you start typing @, Slack will automatically suggest. So it becomes easy. For this, the Bot needs to be added to your Slack Workspace.
PS: Original answer.