Well you can try the following:
# Use Task Manager to restart Windows Explorer.
# Run an SFC scan.
# Use Powershell.
# Run DISM image management command. ...
# Enable the User Manager.
# Disable recently opened items.
# Run System Restore.
# Create a new user account.
For more you should [link|https://wethegeek.com/windows-11-taskbar-not-working/|read|new_window=true] this as well.