列坐王母堂，艷體餐瑤華 found in a text of 《遊仙詩三首》.
Is this not a mistranscription from the left side of 艷 + the right side of 體?

I agree that ⿰豊豊 corresponds to 艷體 in the form of the poem quoted in #7485. However, here we have "{⿰豊豊}飡瓊瑤華" which preserves the five-character poetic metre, so ⿰豊豊 cannot be an accidental mistranscription (I think it is impossible to accidentally mistranscribe 艷體 as ⿰豊豊). It is possible that "{⿰豊豊}飡瓊瑤華" is the original form of the poem, and "艷體餐瑤華" is a revised version which expands the unusual character ⿰豊豊. But even if "艷體餐瑤華" is the original version, I believe that "{⿰豊豊}飡瓊瑤華" must have been a deliberate revision. Therefore, I think the evidence for ⿰豊豊 is satisfactory, and the character should be kept in the M-set.

▲ 中華再造善本//藝文類聚（宋紹興刊本）卷78 folio 7 (blue square, also ctext with worse image quality)

For every 藝文類聚 characters submitted by UK, I have checked against the 宋紹興刊本, the earliest known version publicly available today, so I can provide more evidences per request.