You want to "track" a guest e.g. for a guest room, who cannot be tracked manual. A solution can be to create a Helper Toggle Button. In the example the button will be called "Guest" Then you create the following automation:
alias: Guest as Button
description: ""
trigger:
- platform: state
entity_id:
- input_boolean.guest
condition: []
action:
- choose:
- conditions:
- condition: template
value_template: "{{ states('input_boolean.guest') == 'on' }}"
sequence:
- service: device_tracker.see
data:
location_name: home
dev_id: guest
default:
- service: device_tracker.see
data:
dev_id: guest
location_name: not_home
mode: single
After you Toggle the Button the first time a device_tracker.guest will apear which you can use e.g. for person (with the name Guest)