Trilium allows you to save common searches as notes within the note tree. The search results will appear as sub-notes under these "saved search" notes. Here is an example of how it works:
By default, saved searches are stored in the day note. However, you can designate a different note to store saved searches by marking it with the #searchHome label. Additionally, for workspaces, you can use the #workspaceSearchHome label to specify a storage location for saved searches within that workspace.