The Workflow History list is a standard list like any other.
....../Lists/Workflow%20History is the default, though workflows can use whatever history list they want of course.
I checked my online SharePoint and it looks like the structure is the same as our on premises SP2013.
There's a List ID, which is a GUID, and there is a "Primary Item ID" field that lists the ID of the item. It's an integer with an internal name of "Item".
You should be able to write REST code or Powershell code, or even SharePoint Designer code to be able to grab the information and write it to another list. It would be a chore since you'd have to figure out what guids belong to what, but it looks doable.
The other fields in the history list
Modified Date and Time
Created Date and Time
Event Type Event Type
Workflow History Parent Instance Single line of text
Workflow Association ID Single line of text
Workflow Template ID Single line of text
List ID Single line of text
Primary Item ID Integer
User ID Person or Group
Date Occurred Date and Time
Group Type Integer
Outcome Single line of text
Description Single line of text
Data Multiple lines of text
Created By Person or Group
Modified By Person or Group