CJK Unified Ideographs Extension H has just been released this week.
BabelStone Han only has:
53.6%
coverage of CJK Ext. H.
HanaMin seems to have fallen off the face of the earth. They did not even release an update for CJK Ext. G.
Which fonts give 100% support for CJK Ext. H?
(Maybe Tianheng (天珩)?)