I was the first to lose in a commander game, does Vorinclex ability still happen?
The lands would not untap during their controller's untap step. This is a continuous effect on the land created by the resolution of an effect, and the rules relating to what effects end when a player leaves the game, notably 800.4j, imply that continuous effects created as part of the resolution of a spell or ability continue to apply, even if that player is no longer in the game. There's no rule stating that continuous effects with any timing other than "until your next [turn/phase]" should end, therefore if they're on legal permanents they would continue.

For future reference, however, if the effect where to kill you while the Vorinclex triggers were still on the stack, e.g. from a Lightning Bolt, the Vorinclex triggers would be exiled as you left the game from having 0 life, so they would NOT affect the lands.