Hi
Yes, DofE = Duke of Edinburgh
A scheme introduced by Duke of Edinburgh for the youth with specific tasks and criteria to gain a more rounded life experience
Duke of Edinburgh actually described it as a Swiss Army Knife of skills and experience
Roughly criteria (all logged with improvement shown where required) are:
Skills
Sports
Volunteering
Outbound expedition and Navigation
The DofE SAKS used to be available in a few places and also the DofE site itself, but due to the changing and tightening of UK knife law (I think) they were discontinued in 2017
So I think my only option may be to try and find used DofE SAKs, or more likely some DofE scales to put on other similar models