We haven’t merged any servers on Modern World of Warcraft, Mahalina. As Kozzae mentioned, the only ones to go through that were the Classic realms.
Now, from what I can see you have characters on multiple realms, including characters on Destromath.
Did you actually select Destromath as a server to check it? The character count won’t show up if you haven’t logged into the realm for a while. I can see a level 85 Mage on Destromath that hasn’t been logged into since 2012.
Keep in mind with the level squish we did during the Shadowlands expansion, the level will be considerably lower than 85.