Variant of 肅

Treat it as 肅, then read the word around it.

Chinese dictionaries give 肅 senses including respectful, solemn, strict, and putting things in order. Shuowen Jiezi, an early Chinese dictionary, glosses it as carrying out duties with respectful care. Japanese references list 𮌄 as a variant of 肅.

Why is this form recorded separately?

A Japanese glyph catalogue preserves it.

Japan's Moji Jōhō Kiban project collected characters used in government administration; Unicode links 𮌄 to its JMJ-058374 record. The Extension F submission process ran during 2012–2015; that dates encoding work, not this form's first appearance.