I have it on super good authority that on the Wing it is stored in the digital dash itself. That actually makes a lot of sense and I bet that is true of all bikes.
I only know about bikes I have had. On the Wing, the Vulcan and the Nomad no the miles are not part of the the ECU/M.
The manual Wing has 10 computers for all that stuff. The DCT has 11. No idea which one contains the mileage.
The 24s are coming in now. This place has a 23 6mt for 24k. Good deal. Someone said they have a DCT discounted also but I can't find it on their site.
https://www.ridersvillecycle.com/Inventory/New-In-Stock-Inventory-for-Sale?utm_source=google&utm_medium=organic&utm_campaign=GMB-service