No, as of now, there is no way on the Punchh platform to segment such users' data who have no devices associated with their accounts.
Below are the options available for Segments for mobile devices - Sign Up Device & Last Device Used. Guests without a mobile device will not be included in either segment regardless the setup.
For example, a guest that has no mobile device associated with their account would look like below:
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)