@jasjeev Trust you are good.
It isn’t a set in stone rule, and the official guidance doesn’t specify whether authors need to come from the same or different companies. However, based on recent feedbacks, using established sector experts from different organisations is strongly encouraged. It prevents assessors from dismissing authors as mere colleagues and adds valuable diversity to your recommendation letters.
You may also find my previous post on recommendation letters helpful Why Tech Nation Rejects Many Recommendation Letters - And How to Avoid It
All the best.