Do you use folders?
I use folders to silo things. Specifically, I have all my daily notes in one folder, all my project notes in a Projects folder with big/long/important projects in their own sub folders.
For specific topics I want to dive into, I have a topic folder. For example, right now, I have all my “mature” notes in one place, but since I’m kind of digging into workshops and facilitation right now, I have those notes in a Workshops folder.
I used to have a topic folder on PKM, and once I was done wrestling with that topic, I moved all the notes to the main area and deleted the folder.