While the Standard Model (SM) has been extremely successful, it fails to explain the origin of neutrino masses and of the baryon asymmetry of the universe. Extending the SM with right-handed neutrinos in the type-I seesaw framework provides the necessary ingredients to solve both of these problems. In addition, one can predict the PMNS angles and other low-energy parameters if we endow the model with a flavour symmetry from the series of non-abelian groups $Δ(3n^2)$ and $Δ(6n^2)$ and a CP symmetry. In this work, we study the impact of these symmetries on the predictions for neutrino oscillation data, low-scale leptogenesis and the testability prospects of the model. Based on 2203.08538 and some upcoming work.