Automation Build Destination to Slack Webhook URL Issues

Hello,

We configured webhooks for Web build to POST a message on successful completion of the build.
Build success message pops up in the Slack channel, but the Preview URL is missing. Is this the expected behavior? As per Webhook documentation, the POST payload should contain the URL to the current successfully build preview. Our subscription is the BASIC plan.

Web Automation Webhook

Appreciate it if anyone of you has encountered this issue and let us know how it is resolved.

I believe that today, only native builds will include the artifacts.

That said, can you confirm that web preview URLs are turned on for the app?