There are five in the cases linked in the article. Only two of which claim to have presented at a port of entry. It would be interesting to read the governments response to these claims.

Every one of these claims state...

"The government understood the harm that it was inflicting on these families. It took
children from their parents not in spite of the harm, but because of it, intending that the terror
inflicted on these families would deter other families from migrating to the United States."

Nobody took children from their parents. Those parents brought those children several thousand mile to the border and willingly handed them over.

As I said, they need to sue themselves.