Computer: 27" iMac - MacOS Ventura 13.1
External Hard Drive: Toshiba 4TB - APFS.
I'm having the same issue, after a power cut.
iBoysoft Data Recovery can see and rescue the data but not the folder . I'm on the trial version now (so if I don't want to pay near 100 USD, I can rescue only 1Gb). I'm still looking how make the hard drive resuscitate. As far as I heard the bug can be on the format (APFS) and the kind of disc (not SSD).