Thank you Mr. Jort de Vreeze for your solution, it work perfectly but the problem is in the computed field which calculated only one time, imagine that the date_deadline field is set for a later date, the expired field will not change in the future.

If I understand you correctly, you could add a Boolean field in your model where you compute if the date is smaller than the current date:

from datetime import datetime, timedelta

expired = fields.Boolean(
    compute='_compute_expired',
    string='Date expired?',
    default=False,
)

def_compute_expired(self):
    date_operation = datetime.now() - timedelta(days=1) # refer to your date_operation field        
    current_date = datetime.now()
    self.expired = True if date_operation < current_date else False

And then apply t-if for this field.