I am using a translator.
Same problem.
MacBook Pro 13-inch, 2019
macOS Ventura 13.2
External HDD 2TB, APFS formatted.
I don’t have an iPad.
Show All Devices in View of Disk Utility menu.
Right-click the container disk of the HDD that could not be mounted.
I was able to rescue the data by creating an image from ”Container disk”.
This method requires another HDD or SSD