Visit this URL. It’s the bridge wallet. https://bscscan.com/tokenholdings?a=0x1cea61d82818329559cc872b5b89b037c9848c01
Note the Wrapped ZNN balance. The “quantity” represents how much wZNN exists in the bridge. You cannot bridge more ZNN to wZNN than exists in the bridge wallet.
However, bridging wZNN to ZNN is limited by a different contract address. That can be found here z1qzlytaqdahg5t02nz5096frflfv7dm3y7yxmg7 and as of this posting the balance is approximately 160K. Click the “ZTS” tab to find the balance.