code points supported by NotoSerifKhmer

Basic Latin, U+0000-007F

U+0020-U+0040

Latin-1 Supplement, U+0080-00FF

U+00A0

Khmer, U+1780-17FF

U+1780-U+17DD
U+17E0-U+17E9
U+17F0-U+17F9

Khmer Symbols, U+19E0-19FF

U+19E0-U+19FF

General Punctuation, U+2000-206F

U+200B-U+200D

Geometric Shapes, U+25A0-25FF

U+25CC