It’s not available and it’s probably never coming back. The team has said that they find it hard to optimize it enough in order to make it fast and reliable on V3.
I’m slightly heartened by the GitHub issue still being open:
Doesn’t mean that it will come back, but at the moment it’s part of the “Endgame” milestone for this summer, whose description (in its roundabout metaphorical way) indicates they’re potentially aiming for feature parity within a few months.
That said, timelines definitely slip. The “Infinity War” milestone that seems to have been planned for before the V3 forced redirection change is incomplete, 2 days (and counting) past its due date.