Is it possible to get the VHDX path of a given mountpoint when the VHDX is detached?

My test setup:

1. Create/attach a VHDX file and create/format a partition in it with your preferred methods, but don’t give the formatted partition a drive letter nor a mount-point.
   
   Let’s call the resulting VHDX file C:mydisk.vhdx

2. Create a directory to use as mount-point.
   
   Let’s call that directory C:mymountpoint

3. Mount the image file into that directory:

   Get-DiskImage -ImagePath C:mydisk.vhdx |
   Get-Disk |
   Get-Partition |
   Get-Volume |
   Get-Partition |
   Add-PartitionAccessPath -AccessPath C:mymountpoint
   

4. Then detach the image file:

   DisMount-DiskImage -ImagePath C:mydisk.vhdx
   

Now C:mymountpoint is kind of “broken”, but when you reattach the correct VHDX you can access it again.

My question is:

Given C:mymountpoint, how can you get the path of the associated VHDX file (which is currently detached)?