The definition of deportation changed under Obama, making him have 2.5 million in his 8 years compared to Bush’s 2 million, under the old definition it would be a lot lower.
Trump deported 1.8 million people total, Biden deported 2million. However, 2.3 million people were released into the country after being taken into custody, while less than 300k were under Trump.
Biden’s administration has seen double the border hoppers as Trump’s administration did. Despite this he let Trump era border policies expire, making it harder to deport people. He also placed a hold on ICE arrests, deportations, and raids.