You can also call out the power button options (power button menu) as shown below by long-press the power button for about 2 seconds. stock Android Pie. Please note, normally, you need to use the Power off. gracefully. If you hold the power button for more than 5 seconds, Galaxy S10 will reboot.
Now the touchscreen isn't working. I'm scared to fix it because the screen is cracked and it might break when it's removed to replace it. Yeah you're probably gonna want to get that screen fixed. If you still have that USB to USB-C dongle thing that came with the phone, you can plug in a USB mouse to navigate the phone and backup your files
1. Perform a Hard Reboot. If your Samsung phone appears stuck in Airplane Mode and if it’s not responding, you can start by performing a hard reboot. Don’t worry, this will not affect your personal data. To hard reboot your Samsung phone, press and hold the Power button and the Volume Down button simultaneously for more than 7 seconds.
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