balance of sub-wallet not in main wallet address (blockchain.com) I'm quite new to bitcoins so apologies if i'm being a noob, but I'm very confused!

I have many sub-wallet which created with pycoin command line.

for example, I created subwallet like this:

ku -a xpub -s 0/77 -a


my main bitcoin address and xpub is in blockchain.com.

after someone send BTC to my sub-wallet. I can check that is really confirmed (wallet and transaction in blockchain.com). 

But when i go to my wallet in blockchain.com i can'nt see this balance. where is my mistake and how can I solve that?
A wallet service or application will not be watching all possible derivation paths.  Yours at 0/77 is definitely not a standard derivation and you should not expect any wallet to pick up on transactions sent to addresses under that path.