For some reason, Carl used 4.-note and not Dorico’s default 4-8, but we disregard this error and just focus on whether the durations should be adjusted so that the fermatas align, e.g. is this
This is the crucial question, in this and so much else.
In an instrumental part, it is often essential for a player with a long note to know exactly where the fermata is within it (particularly if the music continues); but for one keyboard player, at the end of a piece, the first example is absolutely correct.