Although this is in the PROGRAMMING DISCUSSION forum, I'm guessing this is a vbulletin specific. So...
As an admin, you can Turn on DEBUG MODE.
https://vborg.vbsupport.ru/showthread.php?t=82835
When in DEBUG MODE, you will be able to see total queries, cached templates, templates used, page generation time, etc.
All templates and phrases are queried/cached (1 query) per page visit.
If you have an uncached template you will need to add it to the $globaltemplates array.
All plugins/products information are queried/cached at the start.
Individual plugins can create additional queries ... you will have to review each product/plugin you install.