That asylum seekers used to be released prior to their hearing, and are no longer? It's official policy https://www.politico.com/story/2019/04/16/doj-bonds-asylum-s... . If you don't trust politico, they link to AG Barr's memo, which states: "The question presented is whether aliens who are originally placed in expedited proceedings and then transferred to full proceedings after establishing a credible fear become eligible for bond upon transfer. I conclude that such aliens remain ineligible for bond, whether they are arriving at the border or are apprehended in the United States"

There's also the issue of parole: releasing asylum seekers if they were initially approved for asylum by the court but the government is appealing the decision. In Damus v. McAleenan. In the recent decision (https://www.courthousenews.com/wp-content/uploads/2019/09/as... ) the Judge notes that, while parole was granted in over 90% of these cases in 2016, parole hasn't been granted for a single such case in all of 2019.