This search might have some info, but I don't know that there's any completed projects using an ICE. Some use the person as an "engine" to drive the generator, burning food as fuel.
https://endless-sphere.com/forums/search.php?keywords=seri*+hybrid*&terms=all&author=&sc=1&sf=titleonly&sr=topics&sk=t&sd=d&st=0&ch=300&t=0&submit=Search
I don't think it shows in the search but there was a member Lowracer (since disappeared along with his videos/etc) that built a human-engined serial hybrid trike, and rode that around.
I don't know if Augidog's is parallel or serial, but you can look up his bike and check it out.
There's others that have put generators or solar panels on bikes, trikes, or trailers, which are also series hybrid, but they don't come up in the search above, and because they generally don't use the term in their posts they are hard to find in a single search, or to narrow down in a search very far (takes a lot of manual looking thru results to find them).