You cannot delete a property listing from your HomeRunner website inside WordPress. This is intentional.
Why this happens. Property listings on your website sync automatically from your property management software (PMS). If you deleted a listing in WordPress, the next sync would recreate it, so deletion there is blocked.
How to remove a listing. Deactivate or remove the property in your PMS. Your website picks up the change automatically, usually within the hour.
Keeping a property active in your PMS. If the property needs to stay active in your PMS but should not appear on your website, contact support. Support can exclude it from the site instead.