1. That speech was
after the election. One generally makes campaign promises before the election.
2. If "reconciliation" is the same as a "peace settlement", it's exactly what Zelenskyy did:
https://en.wikipedia.org/wiki/Volodymyr_Zelenskyy#Attempts_t...
https://www.bbc.com/news/world-europe-49903996
And he took a lot of heat for it, since at least some Ukrainians regarded it as "capitulation".
Unfortunately, as far as Mr. Putin (and most of the world) believes, "reconciliation" means distancing Ukraine from western Europe and becoming a Russian client state. Zelenskyy did not do that, he never promised to do that, it would be in violation of the Ukrainian constitution, and if your "research" has actual evidence that he promised that, I'd appreciate it if you would show me 'cause I can't find it.