Trump never lowered inflation. He inherited a low inflation from Obama, and inflation was low all over the world. Actually his tax cuts resulted in a bit higher inflation than in other countries before Covid.
Trump also never reduced or stabilised deficit or debt, he increased them significantly even before Covid.
So it's just a list of empty promises, as even someone like you, who is well informed about Trump and the GOP, has absolutely no idea of how they intend to achieve it.