BQ27Z746: BqKeyPackager SHA256

Hi, TI experts，

There is a confusing pop window when I generate bqk files, and the steps are as follow:

1.Choose "SHA256 Key bq9035"

2.Choose "Chanllenge(20~32bytes/40~64 hex)" and then enter SHA256 Chanllenge 1 and  Chanllenge 2

3.Choose “Key(32 bytes/64 hex)” and then enter Authentication Key

4.Enter password and comment

5.Rechoose "Chanllenge(20~32bytes/40~64 hex)"

And then click “Create bqKey File”, there will be the pop windows like this: 

I think the “0x0303030303030303030303030303030303030303030303030303030303030303” will be the HMAC SHA256 Key.

The question is: 

(1) What's the “Generated SHA256 Key” stands for? Will this Key affects the authentication process?

(2) When can the bqKeyPackager with bq9037 option release? (refer to https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1199589/bq27z746-bq27z746-the-hmac-sha256-keys/4527142?focus=true#4527142) Because I need it urgently, can you please share one to this account in advance?

Waiting for your reply.

Thanks!