Those absolutely are in the context, given they already had a document that was ready to be signed and _expected_ to be signed if Zelenskyy even took the trip. That is also the reason this got so public, it was NOT supposed to be a negotiation but Zelenskyy just faux pa'd hard.
This just isn't true. He had been publicly stating that there needed to be security guarantees for weeks before the meeting. Also, perhaps if Ukraine had been involved in the prior "peace talks" he would have had an opportunity to state this directly to the US administration.