The whole point of T2 was that the future was not set, so John being the savior doesn't actually matter, indeed Sarah spends a large portion of T2 trying to make sure he doesn't become the savior by preemptively destroying Skynet. Dark Fate reinforced the core message of Cameron's Terminator films (1+2) which is the "no fate" line (which was originally intended to appear in the first film as well).
S3anyboy t1_j2cdc2d wrote
Reply to comment by SoFool in Question for those who’ve seen Dark Fate, and may even like it. by Screenwriter6788
The whole point of T2 was that the future was not set, so John being the savior doesn't actually matter, indeed Sarah spends a large portion of T2 trying to make sure he doesn't become the savior by preemptively destroying Skynet. Dark Fate reinforced the core message of Cameron's Terminator films (1+2) which is the "no fate" line (which was originally intended to appear in the first film as well).