Here's what looks like an answer: https://www.washingtontimes.com/news/2023/jun/30/joe-biden-forced-build-donald-trumps-border-wall/

TLDR: This is a 2019 law passed by Congress during the baby hands administration. The Biden administration has been pretty careful not to overstep other branches of government(I think as a direct response to how flagrantly and harmfully baby hands used executive action), and while Biden returned wall money taken from the DoD, the rest of the wall money was explicitly designated by Congress for building the border wall in 2019 and Congress will not cancel that legislative order(wall funds), despite Biden asking Congress to cancel the 2019 wall funds law since arriving in office in 2020.

This post is misleading, the money is being legally used for a legislatively required purpose and any federal laws are being broken legislatively by Congress as a result of baby hands in 2019, not the Biden administration.