Though this figure is emblematic of the Biden administration's failure to contain the border crisis, Biden has passed the buck to "failing communist regimes" in Latin America, as if Cuba, Nicaragua, and Venezuela have started failing recently. It was Biden's soft policies that created this perfect storm. They reinforce a vicious cycle that encourages immigrants to try to illegally cross the border into the US.
Indeed, the migration flows across the US-Mexico border have reached a peak in some ways during the Biden administration - including an all-time high in arrests - but they aren't unprecedented at all. Nearly 50% of those arrested have been quickly expelled from the US. Also, in the early 2000s unlawful entries were much higher, peaking at 3.7M in 2000 and 2.8M in 2006. Context is vital here.