I don’ t know why Harry just doesn’t use the shield tag on Mouses collar to locate the bracelet, and use earth magic to recover it from the waters of Lake Michigan, as iron was used in its construction. Harry can wear iron, he just can’t have it penetrate his skin.
Frankly give his improved focus and that bracelet, Harry should be able to generate a shield AROUND an opponent in a sphere to reflect their attack back at them or ‘hampster ball’ them and then quickly reduce the size of the sphere crushing them into a small ball. Would work wonderfully for Blamps and ghouls, and catch out someone like Cowl expecting to deflect an attack from one direction when the attack is from all direction simultaneously. The best defence is a strong offence, so turn your defence into a weapon.