> There is no evidence for projected warming <3-4C of any tipping points that significantly change the warming trajectory.

Just to back up this point, r/science discussed a paper in Science which examined known tipping points 5 months ago. I extracted a list of those tipping points, their thresholds, their effects, and their timescales.

As you say, none of the near-warming (<4C) near-term (<200-year timescale) tipping points had significant global effects on warming or sea level rise.