Is it permissible to act upon the opinion of the Hanafi school of thought, which considers the ablution of a person with a continuous ritual impurity to be invalidated by the exit of the prayer time, not its entry, in order to perform the Duha and Dhuhr prayers with a single ablution, as a تسهيل (facilitation) for him?

The ablution of a person with سلس (incontinence) becomes void with the expiry and entry of the prayer time, if any discharge occurs from their سلس . If any other impurity exits, it is an invalidator in all cases. There is no blame on a layperson for following any of the recognized schools of thought, as long as it does not contradict a textual religious ruling. Since this issue is subject to scholarly disagreement, it is permissible to adopt the Hanafi or Maliki school of thought, which holds that the سلس discharge does not invalidate ablution, especially if doing so would cause hardship or difficulty. However, the more cautious and preferable approach is to perform ablution for each prayer after its time has begun, if doing so does not entail hardship. But if one performs ablution before the prayer time and nothing exits from them, their purification is valid.