Field Editing Mode

Hello.

Please i have made some feilds in my from to be non editable. However, i suppose if the field is not editable the filled data (field) should be grey (See image) currently when i go to edit from, the fields are not editable but it remain same as a normal field. How can i make none editable field highlight in grey?

I use latest Joomla 5, Helix ultimate template-latest, i chose Bootstrap 5 in the from layout configuration.

Thank you.