If we accept kanji-kana hybrids for encoding then allow hiragana and katakana in IDS, but only when the component really is a kana letter (not just when a component looks like a kana letter, e.g. do not allow リ for lhs of 师). In that case, ⿸尸ソ would be a better IDS for this character.

Postpone for further discussion, the issue about how to treat the hybrid characters has not reached a conclusion.

I completely understand not accepting script-hybrid Han ideographs that include Latin or Hiragana components at this time, but there are already CJK Unified Ideographs that include Katakana components, and even one whose components are all Katakana. In such cases, and as in the proposed ideograph, the Katakana components are manifested as Han components. Katakana are derived from Han components.

Script-hybrid Katakana + Han:

U+2B9A4: Reading = カイチ (ka + ichi); Components = カ (K) + 一 (Han); See MJ057059




U+2B9AB: Reading = カタナ (ka + ta + na); Components = カ (K) + 田 (Han) + ナ (K); See MJ057066




All Katakana:

U+2BCCD: Reading = ウツホ (u + tsu + ho); Components = ウ (K) + ツ (K) + ホ (K); See MJ057333




As an aside, the following ideograph in Extension F is a Hiragana ligature:

U+2CF00: Reading = して (shi + te); Components = し (H) + て (H); See MJ056854