  We revisit the generalized 2HDM in view of a muon collider proposed by the
International Muon Collider Collaboration (IMCC). The model offers a large
region of parameter space where the observed muon ($g-2$) excess can be
accommodated. Interestingly this parameter space can be probed in a muon
collider with greater advantage than Large Hadron Collider (LHC). In a
parameter space where muon anomaly, lepton flavor violation, electroweak
precision data, B-physics and collider constraints are satisfied, we propose
and explore a unique channel $\ell^+\ell^{'-}\gamma+$missing energy to be
searched at the 3 TeV muon collider as an indirect probe of the low mass
pseudoscalar of the model.
