My iPhone8 on turn on. Cannot get to recovery mode.

AJdel22 wrote:

Cannot get to recovery mode.

You are not doing it right then. Try again using correct instructions.

• 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 recovery mode screen.

source: https://support.apple.com/en-us/HT201263

If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support