Apple ID services consuming heavy cellular data

I’ve been using this iPhone for more than 2 years now and it never happened before but since last few weeks there is this SYSTEM SERVICES showing up very high on my daily data consumption report. And when I see what is system services it said “Apple ID service” idk what is this?

I looked on the internet & YouTube but didn’t got much help. I turned off every possible thing consuming data under my Apple ID for example iCloud, photos, App Store, etc.. but it is still happening everyday.

I am getting very annoyed by this unnecessary data consumption daily. If anyone faced(or facing) similar situation kindly help.

Also the developer team of Apple in this community provide some real solution here, it is just not possible that Apple ID services consume almost 1Gb everyday for nothing.!!!

Attaching some screenshots here for reference.