touch bar disappeared after updating MacBook Pro (13-inch, 2019) to Big Sur 11.6

ShuCal wrote:

after updating my MacBook Pro (13-inch, 2019) to Big Sur 11.6 this October 2021, the touch bar disappeared. the esc and function keys are nowhere to be found.

can anyone please tell how to restore the Touch Bar or any keys to show the esc and function keys?

thanks

On an Intel Mac —

—Try resetting the SMC https://support.apple.com/en-us/HT201295

Even though SMC controls the touchbar, some USB is in play, so this would be NVRAM (or reboot.)

—Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

(get at least two-three rounds of the chimes when holding the NRAM Reset)

notice:

USB Device: Apple T2 Bus

USB Device: Touch Bar Backlight

USB Device: Touch Bar Display

USB Device: Apple T2 Controller