Why I dont see my touch bar but just esc?

helloo!!!! did i just got my mac for nothing:??? basically ,it was a new day wanted to watch some video on youtube etc. after i saw that the progress thing was dissapearing when i pressed on it! after i treied to extend the touchbar options but it wasnt working at all couse all the touch bar dissapears for 1 min but remains just esc and after it shows just siri, the volume and voluminisity adjustment. i tried to restart the device and it didnt work. help me couze i searched online and i saw no one had problems i do help