GBA1 and Parkinson disease: Genetic risk factors impact around 15% of PD patients (Berg et al., 2021) and at least 23 variants have been identified, the most common ones located in Leucine‐rich repeat kinase 2 (LRKK2) and Glucocerebrosidase (GBA) genes (Berg et al., 2021; Poewe et al., 2017).