You can get an idea of some of the possible ways to extend your LabVIEW installation by looking at VI Package Manager's “Destinations” page:
eg. C:\Program Files (x86)\National Instruments\LabVIEW 2020
eg C:\Users\admin\Documents\LabVIEW Data
<LabVIEW>\vi.lib\
<LabVIEW>\examples\
<LabVIEW>\vi.lib\_probes\
<LabVIEW>\project\errors\
<LabVIEW>\help\
<LabVIEW>\templates\
<LabVIEW>\wizard\
<LabVIEW>\project\
See Tools Menu
<LabVIEW>\help\
<LabVIEW>\ProjectTemplates\
<LabVIEW>\resource\Framework\Providers\
See Project Provider
<LabVIEW>\resource\dialog\QuickDrop\plugins\
<LabVIEW>\vi.lib\G CLI Tools\
Custom: <LabVIEW Data>\VI Analyzer Tests
Built-in: <LabVIEW>\project\_VI Analyzer\_tests\