Apple Unicode Tyrany
Apple tries to define what unicode is. It refuses to have font for the following arrows.
wide-headed Barb Arrow
๐ก ๐กข ๐กก ๐กฃ ๐กค ๐กฅ ๐กฆ ๐กง
๐กจ ๐กช ๐กฉ ๐กซ ๐กฌ ๐กญ ๐กฎ ๐กฏ
๐กฐ ๐กฒ ๐กฑ ๐กณ ๐กด ๐กต ๐กถ ๐กท
๐กธ ๐กบ ๐กน ๐กป ๐กผ ๐กฝ ๐กพ ๐กฟ
๐ข ๐ข ๐ข ๐ข ๐ข ๐ข ๐ข ๐ข
these have been in Unicode since 2014, unicode 7. see Unicode 7 New Characters (2014)
There are many other arrows that apple refused to support.