Saving a building-block to a document template does not move the template to the building-blocks folder. The template will remain wherever you saved it.
Building Blocks Organizer will only show the templates that are currently loaded, so, unless you currently have open either "WaiverWorksheetV09.dotm" or a document created from it, your building block will not appear in the organizer.
If you are using code to insert the building-block then:
Code:
"C:\Users\" & Environ("username") & "\AppData\Roaming\Microsoft\Document Building Blocks\1033\16\WaiverWorksheetV09.dotm"
would only work if that is the path that you saved the document template to, which you hopefully didn't.
To insert a building-block from the document template use code such as:
Code:
Dim tmp As Template
Set tmp = ActiveDocument.AttachedTemplate
tmp.BuildingBlockEntries(1).Insert Selection.Range