try this

docs/conf.py

@@ -17,17 +17,18 @@
 import sys
 import time
 
-# sys.path.insert(0, os.path.abspath('../src/flask_debugtoolbar'))
-# breakpoint()
-# import flask_debugtoolbar
-
-
-BUILD_DATE = datetime.datetime.utcfromtimestamp(int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
 # documentation root, use os.path.abspath to make it absolute, like shown here.
-#sys.path.insert(0, os.path.abspath('.'))
+sys.path.insert(0, os.path.abspath('.'))
+sys.path.insert(0, os.path.dirname(os.path.abspath('.')))
+sys.path.insert(0, os.path.abspath('../src/flask_debugtoolbar'))
+# breakpoint()
+import flask_debugtoolbar
+
+
+BUILD_DATE = datetime.datetime.utcfromtimestamp(int(os.environ.get('SOURCE_DATE_EPOCH', time.time())))
 
 # -- General configuration -----------------------------------------------------
 
@@ -62,9 +63,7 @@
 # built documents.
 #
 # The full version, including alpha/beta/rc tags.
-from importlib.metadata import version
-release = version("Flask-DebugToolbar")
-# release = flask_debugtoolbar.__version__
+release = flask_debugtoolbar.__version__
 # The short X.Y version.
 version = '.'.join(release.split('.')[:2])