You are flat out wrong.
en.wikipedia.org
Termination, reinstatement, and Supreme Court ruling (2021–present)
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In February 2021, the administration of President Joe Biden ended the "Remain in Mexico" policy, resuming admission of new asylum seekers and the approximately 25,000 with pending cases to the United States, and asking the Supreme Court to dismiss the appeal as moot.[24][25] On August 14, 2021, a federal judge in Texas ordered a resumption of the Trump-era border policy that required migrants to remain in Mexico until their US immigration court date.[26][27] The court ruled the reversal may have violated the Administrative Procedure Act, which prevents arbitrary regulations, because it did not consider various facts.[26] A stay to block reenforcement of the "Remain in Mexico" policy was denied by both the Fifth Circuit Court of Appeals and the U.S. Supreme Court,[28][29] compelling the administration to reinstitute the policy.[30] In December, the administration announced they had agreed to requirements by Mexico for the resumption of returns, including COVID-19 vaccination, completion of cases within 180 days, and inquiries into fears of return to Mexico.[31]
After the completion of negotiations with the government of Mexico, the Biden administration announced the resumption of the practice on December 2, 2021, with some alterations.[31][32] On June 30, 2022, the U.S. Supreme Court ruled in Biden v. Texas that the Biden administration had the authority to end the policy.[33][34]