Hi @DimpleSaggi04773 we have some samples posted here.
Note: Every Sample and Readme.md file has a Vidcast video accompanying the sample so that would be the quickest way to see a demo and explore capabilities.
There are many such widgets here - including call control, iFrame based, etc
It also points to the Widget starter that has some information.
Please try to make the widgets work locally to explore their functionality.
We will try to post some layout and widget 101 for partners on customization soon.
Thanks & Regards,