emojis disappeared from touch bar

Restart your MacBook Pro to reset the Touch Bar. Check if "Show Control Strip" and "Show Emoji & Symbols" are enabled in System Preferences > Keyboard. If enabled, try toggling them off and on. If the issue persists, reset the NVRAM/PRAM. Contact Apple Support if the problem continues.

There has been a recent infestation of these Forums by AI / ChatBots.

They may appear as well formulated with what appears as possible technical solutions.

Suggest being very careful about this.

Some suggestions can be very incorrect, misinformed  and even impossible to do.

The previous suggestion to Reset the SMC and NVRAM is predicated on your computer is Intel Computers

If you have Mac with Apple silicon

Find out if you have a Mac with Apple silicon

Make sure that your Mac is plugged into power, then take one of these actions. 

• Restart: Choose Apple menu  > Restart.
• Or shut down: Choose Apple menu  > Shut Down. Then press the power button on your Mac to turn it on again.

No other steps are necessary for Mac computers with Apple silicon.

If you have a Mac with Apple silicon

Find out if you have a Mac with Apple silicon

The steps to reset NVRAM don't apply to Mac computers with Apple silicon, and aren't needed on those computers.