Thanks to Se-Kuyng Park for the info: Pyongyang Broadcasting Station and Echo of Unification have stopped operation:
https://www.spnews.co.kr/news/articleView.html?idxno=75583&fbclid=IwAR2AFh4xTPyBGIoF1-fg7rI-kdoKmx-DZSqPf-wD2PtVJrU7nAvaHhbc1w8
Mauno Ritola to WRTH FB group (2024-01-14)