If macron really believes that trump will do what he says than he is a bigger fool than anyone thought and if the Kiev independent (brought to you by USAID) thinks that Macron really knows what is going on with trump they are even stupider.

Macron relayed Trump’s assurances that Washington was ready to support European security after the war

How does this mean security guarantees for Ukraine?

Even if trump had specifically said he was going to give Ukraine security guarantees it doesn’t mean anything because trump is a blow hard. His so called “peace deal” between Armenia and Azerbaijan was a statement of intent. He claimed to have “obliterated” Iran’s entire nuclear program with 0 evidence besides pictures of a couple little holes in the ground. None of the “deals” he makes have lead to written and signed contracts. Heck he organized a whole summit with Putin just to avoid following through on an ultimatum with a deadline he himself imposed.