oh my god i just realized When 2014 Thanos realised that the Avengers were attempting to undo the Snap, he travelled forward to 2023.
But it wasn’t just nine years in his future, but across to an alternate timeline.
After all, since 2014 Thanos and 2014 Gamora died in Earth 616’s 2023, this means they just disappeared from their timeline.
In that alternate timeline, Gamora never joined the Guardians of the Galaxy or was sacrificed at Vormir, Star-Lord never obtained the Power Stone, Loki escaped in 2012 with the Space Stone and most crucially of all – Thanos never implemented the Snap. thus meaning Tony is alive