You can use type: state-label with a dummy sensor and place the text in prefix.
I have one with non-existence sensor.blank to display the text “Front Door” in my picture-elements:
- type: state-label
entity: sensor.blank
prefix: "Front Door "
style:
top: 90%
left: 14%
font-size: 1.1vw
color: white
font-weight: bold