My Osage hunting bow started out at 57#@28”, 63” ntn. I made it in 2011. After shooting 300 or 400 hundred arrows through it, I decided to see what it could do at29”. About the same thing happened to me mid limb on bottom limb. Was going out of state the next weekend to a big shoot and this was the only selfbow that I had.I repaired as you are thinking, braced, filled with superglue, unbraced,then wrapped. I used serving string to wrap because that’s what I had. I am still shooting it 8 seasons later. I wrapped the upper limb to match strictly for looks. 2 years ago, I cut off the wraps to inspect the damaged area, reduced the weight done to 50#, (due to a bad shoulder), rewrapped and am still shooting it.
No guarantees, but I would gamble on a fix. It’s not a very time consuming fix, and firewood now, or firewood later,🤷🏼♂️.