Prior to the Paris Agreement the perspective was that we were heading for 4°C for 2100. If we want to get the target of 1.5°C there needs to be a reduction of 60 % CO2 for 2050 compared to 2019 and net zero for 2070.
Due to the massive roll out of renewables the most probable outcome is 2.7°C warming for 2100. Still very bad, but less catastrophic than 4°C.
The IPCC roadmap to 1.5°C warming:
Global Warming of 1.5 ºC —
an optimistic not (though I don't know how realistic):
A new Climate Analytics study shows that, even after years of insufficient action, the world can still return to well below 1.5°C of warming this century if countries pursue the “highest possible ambition” in climate action.
climateanalytics.org