how are bootstrap-flask bootstrap templates installed?

[rails-smith]

Hello,

I appreciate the work required to create bootstrap-flask.

I have visual feedback that two helper functions (in my base template) are working properly. That is, they are loading Bootstrap resources:
bootstrap.load_css()
bootstrap.load_js()

Can someone help clarify for me how the Flask app sees the bootstrap templates?
The templates (base, form, nav, and more)...

I am using a virtual environment. The venv dir is in my project folder. That should be ok.
Maybe I am missing something important.
These important bits are not accessible by my Flask app:

venv/lib/python3.10/site-packages/flask_bootstrap/static/bootstrap5
css/
icons/
js/
umd/

venv/lib/python3.10/site-packages/flask_bootstrap/templates/base:
nav.html
pagination.html
table.html
utils.html

venv/lib/python3.10/site-packages/flask_bootstrap/templates/bootstrap:
form.html
nav.html
pagination.html
table.html
utils.html

venv/lib/python3.10/site-packages/flask_bootstrap/templates/bootstrap4:
form.html
nav.html
pagination.html
table.html
utils.html

venv/lib/python3.10/site-packages/flask_bootstrap/templates/bootstrap5:
form.html
nav.html
pagination.html
table.html
utils.html

I checked these pages:

https://bootstrap-flask.readthedocs.io/en/stable/basic/#installation
https://github.com/helloflask/bootstrap-flask#readme

Did I miss something? Is there specific guidance as to how to get one's Flask app to see the bootstrap templates in an appropriate way (as a User of bootstrap-flask; not a developer).

Summary: How are bootstrap-flask bootstrap templates installed and seen. Is there a good example to point to?

Thanks!