In this article, you will learn how to update your DNA matches and family tree on 23andMe. If you need any assistance, you can call our family tree support number at +1-888-257-3335.

https://familytreemakersupport.com/update-23andme-dna-matches-and-trees/
To begin with, I was searching for a 'Frazer DNA 2nd cousin' who was recently removed from 23andMe. While doing so, I took a closer look at the family tree on 23andMe. I remember looking at the tree last year and noticed that it grouped some of my relatives incorrectly, mixing up maternal and paternal relatives on both sides of my family tree.
Over time, the tree has improved, but I recently discovered that I can modify the tree to make it more accurate. So I moved my maternal matches to the left side of the tree and my paternal matches to the right side of the tree.