AT&T Note 10 Plus unlocking failed

Is online unlocking for the AT&T Note 10 Plus available yet? I tried to unlock one but Chimera Tool failed to unlock it.

Unlock phone started
Gathering phone info...
Collecting information. Be patient! Do NOT disconnect the phone!
Model: SM-N975U
Sales Code: ATT
Country Code: USA
Timezone: America/New_York
Android Version: 9 [PPR1.180610.011] [SDK 28]
Build Date: Sat Jul 20 17:12:26 KST 2019
PDA Version: N975USQU1ASGO [july 2019, revO]
Phone Version: N975USQU1ASGO [july 2019, revO]
CSC Version: N975UOYN1ASGO [july 2019, revO]
Product Code: ATT
HIDSw Version: N975USQU1ASGO/N975UOYN1ASGO/N975USQU1ASGO/N975USQU1ASGO
Board Platform: MSMNILE
Modem Platform: SM8150
Serial Number: RF8M8------
Imei: 3591XXXXXXXXXXX
Unique Number: CE071937D10A04621E7E
Connections: AT,MTP
Battery Status: 3.92V (63%)
Network Type: GSM
SIM Status: ABSENT
Multisim Config: SS
Knox Version: v30
Warranty Bit: 0
Security Patch: 2019-07-01
Data Encryption State: encrypted
Unlocking...
Unlocking. Be patient! Do NOT disconnect the phone!
Restarting phone.
Waiting for ADB connection. Be patient! Do NOT disconnect the phone!
The withdrawn credits will be refunded within one hour.
Unlock failed.
Finished at local time: [09.06.19 12:05:14]
WorkID: 72330435


*** Thank you ***