Infinite distance and zero gauge coupling in 5D supergravity

In this note, we prove that for all five-dimensional supergravities arising from M-theory compactified on a Calabi-Yau threefold, points of vanishing gauge coupling lie at infinite distance in the moduli space. Conversely, any point vector multiplet space is coupling. This agrees with expectations Tower/Sublattice Weak Gravity Conjecture, Swampland Distance and Emergence Proposal.