Russia proposed the direct talks with Ukraine on Saturday.
Their negotiating team is in Istanbul right now.
If the Ukrainians fail to meet with them the blunder is on them and their Western sponsors.
The U.S. including Trump don’t seem to think these talks are getting anywhere. They have recently said as much - that they wouldn’t be traveling the globe for what has been completely non-productive talks. Why is that? I suspect Russia wants to gobble up more of Ukraine and Z. wants to stay in power. Nothing will likely come of these talks in Turkey.