Ramji R, thank you for posting this question.
You could also use the framework extension for Application Insights JavaScript SDK as mentioned here - https://learn.microsoft.com/en-us/azure/azure-monitor/app/javascript-framework-extensions?tabs=react
Regarding specific questions related to Vercel/next.js, I would suggest reaching out to the Vercel community as mentioned here - vercel/next.js#community
For specific issues related to "@vercel/otel", I would suggest raising it as an issue on the respective issue page - https://github.com/vercel/otel/issues