To what extent is the hadith "Whoever makes all of his supplications prayers upon the Prophet, he will be spared the worries of this world and the Hereafter" authentic, and does it mean to suffice with praying upon him without supplicating for other good things of this world and the Hereafter?

Whoever becomes so engrossed in sending blessings upon the Prophet (peace and blessings of Allah be upon him) that they neglect to supplicate for themselves, their sins will be forgiven, and they will be spared the worries of this world and the Hereafter. This is because sending blessings upon him encompasses the remembrance of Allah, the glorification of the Messenger, and prioritizing him in supplication over oneself. In doing so, one seizes all forms of good, and Allah does not let the reward of the doers of good go to waste.