There is quite a bit of documentation online of many LCD handhelds, it might help out if you are missing something here or there:
https://archive.org/details/handheldhistory
https://www.igdb.com/platforms/handheld
https://www.handheldmuseum.com/
https://www.retrohandheldgames.com/ (archived on there is Matsushima's Voyager, I really want to try it)
https://status.technobezz.com/platforms/handheld-electronic-lcd