Next generation ground- and space-based detectors will provide us with hundreds of
gravitational wave signals from binary black holes, and we will rely on quick, high-fidelity
models to extract as much information as possible from these signals. LISA will have
high enough sensitivity to capture multiple ringdown frequencies, enabling tests of
general relativity. I will present current progress on ringdown modelling as well as our
path towards building a multimode ringdown surrogate model.