Left: confirmed transiting planets from the TEPCat database ( Southworth 2011) around M dwarfs as a function of period. Black circled points indicate planets with a mass determination better than 30%. Circles are color-coded by the host effective temperature, and their sizes are proportional to the planet radius. The red stars mark the two planets in the TOI-776 system. Right: transiting multi-planetary systems around early-type M dwarfs (3500 K< T _eff < 4000 K) with similar architectures to the TOI-776 system. Sizes are proportional to the planet radius, and colors indicate their bulk densities. Planets with no mass determination are marked in white. The brightness of the host star in the J band is indicated next to the system’s name.