Hi anonymous_195,
Thanks for coming to Apple Support Communities for help today with your iPhone 11 that is frozen.
Typically, a force restart can resolve this: If your iPhone, iPad, or iPod touch won't turn on or is frozen
"iPhone 8 or later: Press and quickly release the Volume Up button. Press and quickly release the Volume Down button. Then press and hold the Side button until you see the Apple logo."
However, since you have reset to factory settings and it is still frozen, there might be a hardware issue.
We'd advise visiting Contact Apple Support.
Have a fantastic day!