Delivery on internal setup using auth

I am using ubuntu 22.04
kcli version 2025.12.02-67ee9e96

I want to use routing to my internal setup with auth I am using the doc explicit overriding the mx resolution for scheduled queue through which I am able to route mt traffic but there is a case how to route traffic using auth based can I use shaping in this method?

Without seeing your actual config it may be difficult providing a useful answer. However, smtp_auth_plain_password and smtp_auth_plain_username are documented here along with all the other outbound shaping controls.