No.
"The regulations adopted today mark the implementation of the Martha Wright-Reed Just and Reasonable Communications Act, which established the FCC’s authority to regulate in-state phone and video calls from correctional facilities, in addition to out-of-state phone calls that it had already regulated."
but it would feel much better if you followed up with "and this is <insert reason> why the law is so clear-cut that the decision by the FTC cannot be seen as inventing regulation and so nobody will litigate much less win in court against the FTC".
This regulation implements a law that was passed in direct response to a court ruling striking down the FCC’s ability to regulate in-state prison calls because there was no clear wording in the law granting them that authority. Now there is, as the law was explicitly written to grant the FCC the power a court ruled they lacked.
https://www.congress.gov/bill/117th-congress/senate-bill/154...