As a rule: feedback loops are overrated.

They are, in fact, included in the projections - we'd be on track to ~2C by 2100 instead of ~3C by 2100 if they weren't. They just aren't that big.

There is no "Make Earth Into Venus Feedback Loop Of Doom" that a lot of people seem to imagine when they hear "feedback loop". There is, however, a dozen of things that add about +5% each.