The White House is resisting the word "crisis", but they have admitted that they have more children in custody than they can handle. I think I heard the number 3,400, but I can't quickly find the source. Many of them can't fit in the DHS facilities intended for children and have flowed into CBD adult facilities. It's all made worse by COVID because everyone has to be tested, some have to be quarantined, and the overall capacity of the facilities is reduced by distancing guidelines.
I couldn't care less what conservatives think about the situation (they have no credibility, no standards, and no leg to stand on), but things could go badly for Biden in this area. Honestly, I can't think of a recent president who did a good job with immigration, but that's more Congress's fault than anyone else's.