3 issue in my new Iphone 14 pro max !!!

Let's go through your questions one by one.

Reply to your first question, this was a known issue and it should be fixed on the newest iOS update, (do update your device if you haven't already)

The problem is that while listening to a voice note placing my phone on

my ear the screen doesn't turn off immediately, it requires at least 5

or 6 sec to start getting dimmer. ?

I believe that this is a feature, not a bug.

3-While listening to WhatsApp voice notes loudly, if I lock the iphone,

the sound starts cutting and there is a long delay.

This should be the app's issue, try reaching out to WhatsApp developers.

Just for more info ( can i charge it on the old iphone adapter type A to

protect the battery from heating on fast charge , or its better to charge only on 20 W)??

There is no such thing as charging your phone using 5 watt (old adapter) to preserve the battery health. In short, it is fine to charge using the 20w adapter. Overheating while charging mostly occurs when:

• the phone cover is on
• running tasks on phone while charging
• charging in a hot environment