@meganL @ascentale #BikeNite A7: Oh, right, I was so focusing on weight-related stuff that I totally forgot about #JulianeNeuss' company #JunikHPV who is not only well-known for her Brompton stuff but also for making bikes specifically for dwarf/little people, often based on Brompton or Birdy parts on extended children bike frames or individually crafted frames: https://junik-hpv.de/arbeitsbereiche/fahrraeder-fuer-kleinwuechsige-menschen/ (German only)
She also builds e-bikes and trikes for dwarf/little people.