Isn't the included horn in all trims pretty standard? Sounds like a normal horn? I only test drove a standard model and the horn seemed fine to me. Heck of a lot better than the dinky horn I had on my Jeep Patriot 5 years ago.
I have a 2022 and was using the horn today, and it was definitely different than what I've heard the 2021 models sound like in some YouTube videos. Maybe you can consider switching out your 2021 part for the 2022 part?
Does your 2021 sound like this? Or is this just a pre-production model thing?
My '19 Edge had that problem. Single horn from the factory sounded terrible. Cured it by installing the dual horn setup from earlier model Edge. Simple fix. Found all the info, pics, and part number on the Edge forum.