Hi @Puja Dalvi ,
In general, if the pipeline is queued then most probably it might be because of non-availability of agent in agent queue or it might be because of various other reasons that are explained here. I would recommend to review the provided reference link and troubleshoot the issue.
On the other hand, Azure DevOps is currently not supported in this Microsoft Q&A platform. You may ask Azure DevOps related questions in this developer community for insights from Azure DevOps community SME's on the topic.