A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
Dear and respected,
Good day!
Thank you for posting to Microsoft Community.
We understand the scenario you are getting the null response during SharePoint REST API. In this situation, we suggest you post in the related SharePoint development community to get the dedicate support from engineers and experts there. See: Support and Feedback | Microsoft Learn
Appreciate your patience and understanding and thank for your time and cooperation.
Sincerely,
Mia