Via TRAC:

TRAC found that the immigration cases of nearly 3,911 people out of 26,432 pending cases enrolled in MPP at the end of January were transferred out of MPP hearing locations so far during the Biden administration. These individuals joined 2,987 people with pending MPP cases who, due to special circumstances, were allowed to enter the country during the Trump administration to await their court hearings.

Rates of case transfers out of MPP varied by court, from a high of 28 percent of cases assigned to the MPP court in Brownsville, Texas, transferred to a non-MPP court, to a low of just three percent of cases assigned to the MPP court in Laredo, Texas. Even though nearly 4,000 cases had been transferred away from the border in February and March, more than 85 percent—or 22,521—of the 26,432 pending cases in MPP courts at the end of January have not been recorded as transferred out of an MPP court by the end of March.