When I log into Help Lightning, I do not see my other team members.
If you previously set up a personnel account with your company email, you may be logged into it. The top of the screen will display the account you are logged into. If your company name is not displayed, you will need to find the invitation to your business account and accept it. This will move your account over.
However, if you are in your business account, you may be set up in a restricted group. Contact your administrator.