Can we use list of Map in Salesforce?

Yes, We can use here's the Example ---

List <Map<String, Integer>> a = new List <Map<String, Integer>> {
new Map<String, Integer>{'p1'=>10, 'p2'=>10},
new Map<String, Integer>{'p1'=>20, 'p2'=>20}
};

Yes we can use list of map in Salesforce
for example
List<Map<Id,Account> listofMap = new List<Map<Id,Account>>();