Pep said it was offside, Lampard said he'd been told it wasn't but may just have been told that it wasn't considered because it wasn't handball (so wasn't checked). I don't think "they" said it had even been checked.As far as I recall they said at the time that VAR had checked and there was no offside.
So, in the absence of any evidence to the contrary, my current stance is "All this fuss, and it was offside anyway."