16pesonalities.com is not actually a Myers-Briggs test, is a big 5 test masquareded as a MBTI, and from what i heard alot of people who take MBTI seriously aren't the biggest fans of 16personalities.com
here for more on the big 5 https://www.truity.com/book/big-five-personality-model
here on why self-report questionnaires are imperfect https://mbti-notes.tumblr.com/basics#tests