Iphone 11 pro max can't turn on

Have any of the steps at If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support worked for you yet?

1)Check for any dust under the charging port.Clean it and try to charge it and see if it works

2)If this doesn’t solve your Issue,

contact Apple support

https://support.apple.com/en-us/HT201412