The top 5 China, USA, India, EU and Russia emit a combined 64% of global emissions. The top 10 emitters adding Japan, Iran, Saudi Arabia, Indonesia(,Germany but it is part of the EU) and South Korea are at 74%. https://ourworldindata.org/grapher/annual-share-of-co2-emissions?tab=table

Of the lot only the USA has actually put in a contribution and well it then left the Paris Climate Agreement. So nobody really did.