I created them. Unfortunately I’ve found the Garmin workout builder to be fiddly and the library of exercises to be pretty limited. It also looks like Garmin doesn’t have any way to share workouts natively, but I was able to use this Chrome extension to download the workout. I think it can also be used to import a workout. I’ve attached the files for Scott’s Killer Core (2 rounds) and the strength routine with SKC warmup. You might need to cross-reference the books as I’ve substituted exercises that weren’t available through Garmin.