Is the Hadith: "I am alive in my grave, hearing everyone who invokes blessings upon me," authentic from the Prophet, may Allah bless him and grant him peace?

The hadith, "I am alive in my garden; I hear everyone who invokes blessings upon me," is not found in the Sunnah collections. However, there are authentic narrations confirming the Prophet's (peace be upon him) life in his grave, and that a Muslim's blessings and salutations reach him, and he returns the salutation, as in the hadith: «There is no one who greets me but Allah returns my soul to me so that I may return his greeting.» The hadiths indicating his life in his grave include: «Indeed, Allah Almighty has forbidden the earth from consuming the bodies of the prophets,» and «The prophets are alive in their graves, praying,» and «I passed by Moses on the night of my Isra’ (night journey), and he was standing, praying in his grave,» and «Indeed, Allah has angels who roam the earth, conveying to me the salutations from my Ummah.» From these hadiths, it is understood that the Prophet hears the salutation of those near, and the salutation and blessings of those far away are conveyed to him, but he does not hear the supplications or pleas for help of those who are absent. Rather, angels convey the blessings and salutations to him.