Hi, is it possible to make customizations on SCIS such as adding a custom button and all? if so, can you please provide me the links to documentation? Thanks.

SCIS Extensibility API https://system.netsuite.com/help/helpcenter/en_US/APIs/SuiteCommerce/Extensibility/SCIS/list_class.html

Thanks @Mohammad Sharaf Ali, and for the development setup is it completely similar to SCA extension development?

Yes https://netsuite.custhelp.com/app/answers/detail/a_id/80075/

Thank you so much! for all the help

Anytime bruh!

Hi @Mohammad Sharaf Ali, Sorry to bother you. But, got a quick question. I see here in SCIS it is not possible to add child views and so can I render templates? or only things I can do is on events manuplations and show popups?

Four possible customizations can be done for SCIS as per https://netsuite.custhelp.com/app/answers/detail/a_id/79723/

Got it. Thanks again!