BRICS is basically China shoring up foreign markets for itself, and is quite the opposite of defying globalism. To use Wikipedia as a source, because I'm
lazy smart - they're citing IMF numbers - BRICS currently represents 32% of global per capita GDP. However, China by itself represents most of that. The IMF numbers cited by Wikipedia don't quite add up, and I don't have time to figure out why*, but it still points to China running laps around all of its so-called partners: The IMF credits BRICS combined with 40.55 trillion USD in GDP(PPP); China with 30.17 trillion; India with 11.74; Russia with 4.36; Brazil with 3.68; and S. Africa with 0.94. Obviously, that's just one measure of power, but a not-insignificant one. Russia is currently demonstrating to the world that China is the #2 military power. China is the world's biggest market, so having good trade relations with them would obviously benefit all of those countries, but BRICS should probably be spelled briCs.
* Ah, I figured it out: The number cited for BRICS as a group is from 2018. The numbers for the individual countries are estimates for 2022.