Unlike other double-faced cards, meld cards cannot be transformed or converted. Any instructions to do so are ignored.
April 14, 2023 · March of the Machine
rule 712.4c not present in this release
September 24, 2021 · Innistrad: Midnight Hunt
While a transforming double-faced permanent has its front face up, it has only the characteristics of its front face.
July 23, 2021 · Adventures in the Forgotten Realms
While a transforming double-faced permanent has its back face up, it has only the characteristics of its back face. However, its mana value is calculated using the mana cost of its front face. If a permanent is copying the back face of a transforming double-faced card (even if the card representing that copy is itself a double-faced card), the mana value of that permanent is 0.
July 22, 2016 · Eldritch Moon
If an effect can find the new object that a melded permanent becomes as it leaves the battlefield, it finds both cards. (See rule 400.7.) If that effect causes actions to be taken upon those cards, the same actions are taken upon each of them.