The temperature of the coolant and transmission

Hello! I need your advice. Camaro 2017 SS A8. During the trip, I noticed that the temperature sensors of the coolant and transmission show a low level. During startup, I saw that the coolant temperature is normal.

While the engine is running, I can hear that the cooling system is working very loudly and strongly. Also, after I turn off the engine, the cooling continues to work.

Help with advice and tell me what to look for? Thank you