That's fucked up. I assumed the USA would be the last country on earth to do this.
Which it is. The person you responded to doesn't know what the hell they're talking about, and in fact most of the stuff in the "United States" subsection of the "Legislation by nation" section of their very own link they provided says as much, that the Fifth Amendment provides protection against such self-incrimination and that judges usually find as such.
What one federal court of appeals decides doesn't necessarily apply in other districts. The Eleventh Circuit made the Fifth Amendment ruling in 2012, but Lavabit temporarily shut down in 2013 due to FBI demands to hand over encryption keys [1]. (Lavabit was founded in Texas, which is in the Fifth Circuit [2].) The FBI can still send national security letters, which prohibit receivers from telling the public about them [3].
Meanwhile, the Pennsylvania Supreme Court's ruling only applies to Pennsylvania, and the prosecutors were from Luzerne County, not the FBI [4].
[1] https://en.wikipedia.org/wiki/Lavabit
[2] https://en.wikipedia.org/wiki/United_States_Court_of_Appeals...
[3] https://en.wikipedia.org/wiki/National_security_letter#Conte...
[4] https://arstechnica.com/tech-policy/2019/11/police-cant-forc...