Here is my experience with UpMap on my GF's 2021 V7. The unit took a while to arrive but eventually got here in good shape. App was simple to download to my iPhone.
Connecting to the ECU was a little odd at first, but then when carefully watching Todd's video at the top of this thread, I noticed that at 1:21 where it says "this may take a while" he was sliding his finger around and seemed to touch the text at the top of the screen. This was what was necessary, I suppose it makes sense if you had multiple UpMaps connected to multiple bikes within Bluetooth range you would need to select it by tapping. Anyway, that was the biggest hiccup in the process.
For map selection, I suggest reading the descriptions carefully using a full-sized computer rather than on your phone. Since I'm running Todd's GTM exhaust which has some packing but no baffles, I used the V7 US SR map which was described as "DB killer removed" (i.e. no baffle). My assumption is this effects back pressure.
Map uploading was fast and easy. I've used several different software platforms to access motorcycle ECUs and this was definitely the most user-friendly, although it also has the least general utility for me. Basically just useful for remapping.
Bike runs great! After installing the GTM slip-on with the stock map, there was significant decel popping which is now greatly reduced. It also runs smoother and overall feels very sorted out. I have not yet installed the secondary air injection blocking plates, this will likely completely eliminate decel popping.
She's riding it in the DGR today and couldn't be happier!