Resting metabolic results

I’ve recently had a resting metabolic test with a health science lab. The director stands by the results firmly (I also felt off by his confidence prior to the tests), however, after studying and reviewing, I do not believe the data would be plausible. My current health is as followed: 33 year old male, 88kgs and 185cm. After the tests, the results showed an RMR of 900kCal/day burn. From everything I’ve researched, this should be at least double. Some additional context - I have lost \~10kgs in the last 5 months from better exercise and a non-sedentary lifestyle. I have no issues with energy, and quite decent cardiovascular health. Can I get some more input? I had two tests done with similar data from the same lab.