Can cyber end dragon be summoned by activating fusion guard and monster reborn

No. A Fusion Monster cannot be summoned from the graveyard unless it was properly special summoned first. Normally this would be Fusion Summon - the only exception are Fusion Monsters who can't be fusion summoned, like the Neos and XYZ fusions. All you need to do for those is follow their text, for them to be properly summoned. Either way, a Fusion Monster placed straight into the graveyard by Fusion Guard cannot ever be special summoned from the graveyard by any method.