My sons were diagnosed at 2 and 3 via nhs .No ados required was all very quick . Straight into SEN school age 4She may well be getting him tested but the process is very slow in some areas. Ron is almost 3 isn’t he? My boy was over 4 before he got diagnosed but I’d expressed my concerns and been trying to get him diagnosed since he was 2. I’m from a small town in the West Midlands and imagine the process might be faster somewhere like Essex.