Webhook indexing relies on git server webhook sending which are only sent for new activity. This means that previous pushes containing commit, branch, and pull request activity cannot be resent. Historical repository information is not available through Webhook indexing.
Git servers have a variety of webhook sending behaviors. GitHub will limit a webhook to 1000 commits in a single push. Azure DevOps limits a webhook to 25 commits in a single push. GitLab limits a webhook to 20 commits in a single push. We recommend communicating these limitations to developers on your teams.
Because no source code is included in the webhook payload, the code review capabilities available in Classic Indexing integrations are not available.
For more - see Feature matrix of Git Integration for Jira Cloud.
11. I have more questions about Webhook indexing