Even if the "Japanese Glyph Variants" setting added in version 1.20.5 is set to "ON", the Japanese glyphs will only be applied to kanji, and the Chinese glyphs will be applied to hiragana/katakana.

Chinese glyphs in 1.20.6

Japanese glyphs in 1.20.6 (properly applied)

Japanese glyphs in 1.21

The glyphs for kanji (bottom row) are applied properly, but the glyphs for hiragana and katakana (top 2 rows) are not.