The last trumpet is the last trumpet otherwise the last trumpet wouldn’t be the last trumpet.
1Cor15:5 1Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
52In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
He is not pouring out his wrath on them that trust and believe on Him for everything (where did you get that?)he is pouring it on the wicked the people that have the mark
We are in the heavens at the last trumpet AFTER getting the victory over the beast and his mark.
There we are stand on the sea of glass AFTER getting the victory over the beast AFTER the last trumpet Then the seven angels having the seven last plagues pour out the wrath of God upon the people that have the mark of the beast,NOT the people that trust and believe on Him for everything
Rv15:1 And I saw another sign in heaven, great and marvellous, seven angels having the seven last plagues; for in them is filled up the wrath of God.
2 And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, having the harps of God.
6 And the seven angels came out of the temple, having the seven plagues, clothed in pure and white linen, and having their breasts girded with golden girdles.
8 And the temple was filled with smoke from the glory of God, and from his power; and no man was able to enter into the temple, till the seven plagues of the seven angels were fulfilled.
As you can see we are in the heavens or some place AFTER getting the victory over the beast and his mark and before the wrath is poured out on the people that have the mark of the beast
Rv16:2 And the first went, and poured out his vial upon the earth; and there fell a noisome and grievous sore upon the men which had the mark of the beast, and upon them which worshipped his image.
10 And the fifth angel poured out his vial upon the seat of the beast; and his kingdom was full of darkness; and they gnawed their tongues for pain,
So were you got God poured out his wrath on them that trust and believe on Him for everything I don’t know