Replying to AC Joint help needed

So about a year and a few months ago I was hit by a car on my bike and long story short, I got a pretty bad AC joint separation. It has healed for the most part, but is definitely weaker than it was before the accident and any sort of hard impact throws my shoulder and arm out of commission for a few days minimum.

Has anyone dealt with this before/ have any knowledge of strengthening solutions or protection for it?

Any help would be very appreciated.