Snap Camera dont use telephoto lens, it uses only wide angle lens (default).Im on lineage 16 and aux cam works on snap camers app.
Enviado do meu Mi A1 através do Tapatalk
To use telephoto lens on lineage os (Gcam), follow this thread: https://xdaforums.com/mi-a1/themes/gcam-telephoto-lens-t3903465