Ok here is my update for those following this post.
After going back and forward with the installer about replacing the unit and getting sound measurements from a similar install I decided against replacing it.
I instead installed a small gate next to the unit and basically boxed it in with sound proofing underlaid with sound barrier vinyl.
Attached is the photo its not 100% finished yet but so far its taken the edge off the noise traveling down the fence @ around 10 db lower with gate closed.
I have no idea how long the sound proofing will last for outside but might spray it with silicon sealant or something?
Thanks everyone for taking the time to comment very much appreciated 👍