You may have seen the "Atari Lynx 30th Birthday Competition" thread (link below) in the programming forum.
Well the competition is about to produce it's results, on the 1st of September all of the submissions will be
playable online and downloadable as ROMs.
This will be a truely momentous birthday celebration for the Lynx!
More details at the competition page here - https://atarigamer.com/pages/atari-lynx-30th-birthday-programming-competition
Hmm @enthusi also had a problem with the Lynx SD loader, but that's because he copied the LynxSD folder over directly. You need to have the "30bday.lnx" file in the root of the SD card, then the "30bpc19" directory with all the ROMs also goes into the root of the SD card, so your directory structure should look like this...