Stopping chain noise

I read somewhere on the forums how to eradicate chain noise on cold start up. I first noticed the whirring chain noise on cold start up in Austria 2019. Recently I have heard this more regularly especially near oil change time.

I tried the recommendation of turning on the ignition key and wait until the fuel pump stops whining. Wait a further 5 seconds and then start the engine. It promptly starts with no chain whirring noise. So far every time.