You must trigger tags in sGTM depending on user consent. The implementation of consent in server GTM highly depends on your consent management platform and how you deliver data to sGTM.

Don't hesitate to contact your CMP support for more information on how to implement consent in sGTM. 

This stape blog post gives a general description of setting up consent in sGTM
https://stape.io/blog/consent-mode-server-google-tag-manager