[{"_id":{"$oid":"63bff5340d4e704dc919be75"},"appId":"851841552636187","page_id":"102279349307892","form_id":"1495160767680095","leads":[{"leadgen_id":"1853447141682245","date":1673524532695,"email":"test@fb.comaa","full_name":"<test lead: dummy data for full_name>","LeadType":"NEW LEAD","xyz":"iiccccccccccciiiii",},{"leadgen_id":"539323508125510","date":1673524560730,"email":"test@fb.com11","full_name":"<test lead: dummy data for full_name>","LeadType":"NEW LEAD","xyz":"iiccccccccccciiiii",},{"leadgen_id":"928163618347326","date":1673525774538,"email":"test@fb.com","full_name":"<test lead: dummy data for full_name>","LeadType":"NEW LEAD","xyz":"iiccccccccccciiiii",}],}]

db.collection.update({},{"$set":{"leads.$[elem].salesPerson":"63c139f044502fb5aff42fda"}},{"arrayFilters":[{"elem.leadgen_id":{"$in":["1853447141682245","539323508125510"]}}]})