I accidentally Uninstalled my Nest thermostat on my phone

Nice to meet you, *****!
What troubleshooting have you done so far?

Tell me please ,do you have green leaf icon on your Nest screen?

Sorry, why did you mention that?
Oh, you mean you have green leaf when it is at 64.
Right?

Got it.

1. Press your thermostat’s ring to open the Quick View menu.
2. Choose Settings Nest settings icon.
3. Turn the ring to Nest app and press the ring to select it.
4. Select Get Entry Key to retrieve a unique entry key. Follow the next steps below to use your Nest app to add your thermostat to your account.

Tell me please, did you try steps above or you did not?

Understood.
Do you know how to turn thermmostat off?

1. Press your thermostat’s display to view the Quick View menu.
2. Turn the ring to Thermostat heat icon, then press to select.
3. Turn the ring to highlight Off, then press to select.

Can you please try that?

Try please Press and hold the touch bar until “Turn off” appears on the screen.
Did it show you Turn off?

Do you mean you have not tried that yet?

Got it.
After it will turn on try please again to open Settings

Select Get Entry Key to retrieve a unique entry key. Follow the next steps below to use your Nest app to add your thermostat to your account.
Use that key in the app, please.

Do you see Get Entry Key ?

Try please enter as many as it will fit in.

Try please close the key, and open it again.
in Nest I mean