What ISBAO agrees to is irrelevant for EASAlalas.
(and I agree with you, and LOA should be an LOA)
By the way we have been SAFA'd many times, and never have they had an issue with our MMEL/MEL when we show them our LOA.
And if Iīd were to be nitpicking, then I would say a MMEL with an LOA that says the MMEL is the MEL, is basically a MEL.
They have a tick box saying MEL and how you get there (tailored MEL or MMEL made the MEL by LOA) is/should be irrelevant.
BTW, 'MY' Authority made it absolutely clear that we need a tailerod one, there canīt be a MMEL on board if there is one item that could be on board or not (optional equipment).