1.5C was never a threat, it was a target. The IPCC produces simplified "stakeholder" report, it would be a superior use of one's time to just give it a skim than spend time reading clickbaity website titles. https://www.ipcc.ch/assessment-report/ar6/
Policymaker summary report:
https://www.ipcc.ch/report/ar6/wg3/downloads/report/IPCC_AR6_WGIII_SummaryForPolicymakers.pdf
If I may indulge myself one more edit (and then get back to work), why 1.5C is a natural question. As far as I recall it was the middle scenario for the end of the 21st century as calculated much earlier (easy to check if you go back to the early 2000s reports). We've since reached ~1C of warming. In the above summary, they state that the most realistic scenarios: (C7= 4 degrees by 2100), and C6 = 3 degrees by 2100), do not have peak warming by 2100. The reports never seem to stretch beyond 2100, and I wish they would to illustrate this point properly. My biggest fear (though not one I want my kids to have nightmares about) would be that warming continues towards 5C, which apart from everything else, brings the climate close to conditions experienced during the Permian-Triassic mass extinction:
https://en.wikipedia.org/wiki/Permian%E2%80%93Triassic_extinction_event#Increase_in_atmospheric_carbon_dioxide