Might be an unpopular take but here you go…figure I have some leeway as I started the thread…opinion alert!
You might strongly consider finding a doc who will get in there and take it out. It’s generally considered a useless bone and can heal up quickly (I am NOT a doctor).
It was recommended to me earlier in our process by a buddy who is a high ranked mid major RC and we then jumped thru all the hoops and dog and pony show with local docs. Finally found a doc to do surgery (after 6 months in a cast and other stuff) and he said he was lucky he had surgery when he did as the broken bone had a rough edge to it and was fraying a ligament. The broken bone had all sorts of fibrous stuff over it trying to heal/protect the hand and it was a real mess in there. The kid had dealt with bunches of pain and misery over 5 months. The healing process took longer I believe because removal was so delayed it caused all kinds of hand trauma around the break.
@Francis7 feel free to DM or call me if you want to discuss offline.