Yeah, you can absolutely disable Time of Use independently. All the eco+ features are modular.
Go into your eco+ settings. You'll see a slider for Time of Use—just toggle it to 'off'. It disables immediately. You can also edit your Utility Information under Home settings to remove or change the rate plan.
IF THAT DIDN'T WORK: If the eco+ icon is still showing, you might have disabled the entire eco+ suite for the day. Disabling just Time of Use is different. Double-check the specific Time of Use toggle is off. Also, if you skipped setup initially, the feature might not be active at all.
HEADS UP: Time of Use needs an internet connection to work—it's server-driven. If your thermostat is offline, it won't run those schedules. The precool/preheat depths (from 1°F to 4°F) and setbacks (0°F to 3°F) are based on your eco+ savings slider level (1-5).