Reorder Cell Data Using Power Query

I am not convinced that the asked-for outcome doesn't itself contain an error.  Anyway, studiously avoiding any temptation to go for brevity, how about

= SORTLISTITEMSλ(original)

SORTLISTITEMSλ
= LAMBDA(list,
    //  Sort overall list alphabetically
    SORT(
        MAP(list,
            LAMBDA(string,
            // Sort comma-separated strings and reassemble
                LET(
                    split, TRIM(TEXTSPLIT(string, ",")),
                    sorted, SORT(split, , 1, TRUE),
                    ARRAYTOTEXT(sorted)
                )
            )
        )
    )
);