Is there a Sharia-related issue with the format of a supplication (du'a) that includes praising Allah and sending blessings upon the Prophet (peace be upon him) five times at the beginning, then supplicating two or three times, and then sending blessings upon the Prophet (peace be upon him) five times at the end, especially when time is limited?

It is prescribed to praise Allah and supplicate after waking up. Among the authentic supplications are: "All praise is due to Allah, who gave health to my body, returned my soul to me, and permitted me to remember Him," and "All praise is due to Allah, who gave us life after He had caused us to die, and to Him is the resurrection."

And whoever wakes up at night and says: "There is no god but Allah alone, He has no partner. To Him belongs sovereignty, and to Him belongs all praise, and He is over all things competent. All praise is due to Allah, and glory be to Allah, and there is no god but Allah, and Allah is the greatest, and there is no might or power except with Allah," then supplicates, his supplication will be answered. And if a Muslim sleeps in a state of ritual purity (tahara) and remembrance (dhikr), then wakes up and supplicates, Allah will grant him his request.

It is also prescribed to begin a supplication by praising Allah and extolling Him, then sending blessings upon the Prophet (peace be upon him), then supplicating for whatever one wishes. This is more conducive to the success and acceptance of the supplication. As for the method mentioned with its specific numbers, there is no origin for it in the authentic narrations, but there is no harm in performing it sometimes without persistence or believing in its sunnah status.