Try to understand the error:
[INSTALL_FAILED_UPDATE_INCOMPATIBLE: Package with.ample orders.
Signatures do not match Previously installed version; ignoring!]
Incompatibility failure when installing the update, the signature of your package (Your application) is not equal to the installed version; Update ignored!
Uninstall the app from your phone and Compile again that will work.
This sometimes occurs when you compile from another computer, or create another project with the same name as one previously installed on your device.
Heed
Be alert when reinstalling, as your mobile phone is a Xiaomi will ask for permission for the installation, so when the popup appears on your mobile check the "Always allow" option and click Install.
Package com.example.pedidos signatures do not match previously installed version
– Augusto Vasques