  The interfacial coupling between electrons and magnons in adjacent layers can
mediate an attractive electron-electron interaction and induce
superconductivity. We consider magic-angle twisted bilayer graphene sandwiched
between two ferromagnetic insulators to optimize this effect. As a result,
magnons induce an interlayer superconducting state characterized by $p$-wave
symmetry. We investigate two candidate ferromagnets. The van der Waals
ferromagnet CrI$_3$ stands out because it allows compression to tune the
superconducting state with an exponential sensitivity. This control adds a new
dimension to the tunability of twisted bilayer graphene. Our results open a new
path for exploring magnon-induced superconductivity.
