Integrate Pull requests build policy with the Azure DevOps pipelines

We are using the latest SonarQube Developer edition version 9.7.1. to integrate with Azure DevOps, and it works fine. However, we struggle to connect it to our PR level. We followed this Pull Request Analysis | SonarQube Docs, but we cannot see any SonarQube build policy in Azure DevOps for a branch. Also we don’t see any settings for PRs in the SonarQube currently and this is the main reason why we bought Developer edition. Can someone help us fix this issue?