Mac won’t turn on after Catalina required a restart

I completed the Catalina software installation, which required a restart of the Macbook at the very end. I confirmed the restart but have not been able to turn on my Mac since then. It was fully charged. The power button is not responding. I have no idea what to do after trying shift + S, control + command + P + R and command + R. Please help.

Before the installation I had over 44 GB of free space and my Mac ran smoothly.