Saving custom prompts to copilot lab

I've asked both Copilot and ChatGPT for instructions on how to save a custom prompt to Copilot lab.  (We have Copilot for Microsoft 365).  I am not an admin for our account so I cannot see how your account is set up but I don't know if I'm not seeing the option to do this because it's not available or it's not set up in our account.  Can anyone confirm if this is even possible?