No. As you know… static UPROPERTYs are not supported by the engine. But you can find some solutions for this!
For example, if you need more than one static delegate, you might consider creating a static wrapper class where you will store your delegates. A game instance subsystem will be useful for this.
The game instance subsystem works as a static class that can be called from every blueprint and every part of your code. So if you declare your delegates in that class, that can help you. In fact, I just tried that solution and it worked without problems.