What is Russia's current position in the Ukraine negotiations according to BBC's analysis?

According to BBC News Correspondent James Waterhouse, Russia appears to be negotiating from a position of strength in the Ukraine conflict. The analysis suggests that Russia is increasingly having its demands and goals met in the ongoing peace talks. This situation is occurring amid reports that Ukraine is being excluded from critical negotiations between the U.S. and Russia, causing frustration for President Zelensky who maintains that Ukraine must be involved in any decisions about ending the war.