  We study superconductivity of twisted bilayer graphene with local and
non-local attractive interactions. We obtain the superfluid weight and
Berezinskii-Kosterlitz-Thouless (BKT) transition temperature for microscopic
tight-binding and low-energy continuum models. We predict qualitative
differences between local and non-local interaction schemes which could be
distinguished experimentally. In the flat band limit where the pair potential
exceeds the band width we show that the superfluid weight and BKT temperature
are determined by multiband processes and quantum geometry of the band.
