Vyke's quest also had three reward, the first some Neutralizing Boluses, and then two cut items. Though there's no way of knowing for sure. Vyke was meant to have been summonable in Stormveil castle, and Sekiro Dubi posits that it might have been for Godfrey rather than Godrick, as the former's character model was also found to have been spawnable in another datamine.
With dialogue options also having been removed, though still selectable.
Sekiro Dubi also seems to have discovered a cut questline for Vyke, but no text or audio remains from it. In Sekiro Dubi's video, some inaccessible dialogue from Gostoc references "a rather repulsive looking knight" with armour that's "melting inwards, practically falling apart," very clearly in reference to Vyke. And now YouTuber Sekiro Dubi seems to have uncovered some details that might point towards Vyke once having a questline in the game. He's actually a character called Vyke, who is in the game as an invader and in a boss fight. If you weren't aware of it, which would be entirely fair considering how obtuse the lore is in FromSoftware's games, the knight you can see on Elden Ring's cover art isn't actually your character. Some potential Elden Ring cut content discovered by a dataminer might have revealed a questline involving the game's cover art character, Vyke.