No, this gets it backwards.
FTC was never independent. It may have had some trappings of independence, and we may have elected a few (or a lot of) crappy legislators who don't understand legislating, but the FTC was always executive branch.
Other countries SHOULD have known that about the US governance structure as it's pretty fundamental.
It's like folks not understanding that the JCPOA and Paris Accord were agreements with the president and not the country and therefore subject to rescission by the next president.
The FTC was never independent in operation. Sounds like someone might finally tell the EU.