The vast majority of Marxists on social media (and western Marxists in general) only call themselves Marxists to piss off their parents, who likely grew up during the Red Scare and have very negative views on Marxism. In reality, few of these people have ever read anything from Marx other than maybe a few excerpts from the Communist Manifesto they saw on a YouTube video. Some prominent "Marxist" influencers, like Vaush, openly admit to not reading anything by Marx or Engels, yet still call themselves proud Marxists.
Most "Marxists" on Twitter almost never talk about class struggle and view fighting for worker's rights as "class reductionist". Twitter Marxists like to complain about imperialism, but only in the context of shitting on white people for atrocities that happened centuries ago. In fact, they often support Western imperialism in places like Russia and the Middle East
At best, most of these so-called Marxists are anarchists and social democrats. At worst, they are straight up neoliberal and DNC mouthpieces. Given that Keffals supports Ukraine heavily and only really ever talks about trans rights, they are likely the latter.
If you want to see true Marxism, look at the government and economic policies of China, Vietnam, Laos, Cuba, and the DPRK.