See at "Emotional distress, psychosomatic symptoms and their relationship with institutional responses: A survey of Italian frontline medical staff during the Covid-19 pandemic" Tiziana Marinaci, Luna Carpinelli, [...], and Pierpaolo Cavallo, Helios, Dec 2012. They use an interesting tool
Here is a classic: the Somatic symptom index (SSI), developed by Escobar and found at DOI: 10.1097/00006842-199807000-00012.
You can also use PHQ-15, from Kroenke et al. DOI: 10.1097/00006842-00203000-00008.
In any case, it would be useful to accompany this assessment of somatic symptoms with a scale that alleviates psychological distress, e.g. HADS or DASS 21.