To make a sensor or helper appear as read only in your dashboard: use the simple-entity type option.
https://www.home-assistant.io/dashboards/entities/#options-for-entities
.
Combine this with disabling the more-info pop-up (where it could be edited) and you have a read only entity display. e.g.
type: entities
entities:
- entity: input_number.rain_limit
- entity: input_datetime.mstr_bed_blanket_on_time
- type: divider
- entity: input_number.rain_limit
type: simple-entity
tap_action: none
hold_action: none
- entity: input_datetime.mstr_bed_blanket_on_time
type: simple-entity
tap_action: none
hold_action: none
Top two entities are editable, bottom two same entities under the divider are not:
