Here is my code

@api.model_create_multi

    def create(self, vals_list):

        # context: no_log, because subtype already handle this

        maintenance_requests = super().create(vals_list)

        for request in maintenance_requests:

            if request.owner_user_id or request.user_id:

                request._add_followers()

            if request.equipment_id and not request.maintenance_team_id:

                request.maintenance_team_id = request.equipment_id.maintenance_team_id

            if request.close_date and not request.stage_id.done:

                request.close_date = False

            if not request.close_date and request.stage_id.done:

                request.close_date = fields.Date.today()

The bold one is the part that i'd like to change to datetime now.