Not exactly sure what you are trying to communicate. Have you taken a look at Font Book lately? It's improved considerably. It's so good, our designers found they don't need a 3rd party font manager.
You can right-click the left-sidebar and creating a new Smart Collection, change 'is' to 'begins with' and input a value of "Noto Sans". Save the Smart Collection and whammo, there you go. Easy access to Noto Sans. You could also create a Collection folder and right-click and add fonts to the Collection.
You can Deactivate fonts you don't use frequently. You can search fonts very quickly. You can browse and review fonts quickly. Click the Help menu and review the Help for Font Book.
You may need to restart the App to display a new collection. If an App doesn't display the collections then you should reach out to the developer and make a feature request to use the Apple font API's. I can see that Microsoft displays the collections at the top of the drop down list of fonts. Other apps might use the macOS font dialog and that certainly will show the collections.
