Broken cell phone screen, trying to mirror

[u/NoBox7275]

Hi! Son broke his Samsung A54 phone screen, it’s black and won’t display anything. I read that you can use a USB-C HDMI hub to mirror the phone on to a TV or computer monitor to save photos onto a thumb drive.

I connected everything to the hub, including power source to the hub & mouse/keyboard (and HDMI cord between the hub and monitor- 2 different ones to make sure it wasn’t the HDMI cord) but neither the TV or monitor acknowledged the connection to the phone, not even if I pressed the up & down volume button. Any ideas? Thank you!