Strange sound coming from Half Ignition

Hello there. My vehicle is 301 1.6 diesel 2016 model. It makes a strange noise on half ignition. Like sizzle. There is no problem in its working. I don't know what.

If the vehicle is automatic, I guess the oil engine of the transmission is working

car diesel manual

Hello everyone, I'm new to the group, I'm in trouble with the gearbox.