iPad Air M1 heating issue

Many reports are seen here concerning warming of an iPad while using the Notes App, with a Pencil, for extended periods.

It is not unusual for an iPad to become warm when being used - more so when using some types of iPad case. High screen brightness and/or CPU intensive Apps will also create more heat.

The key point is that whilst your iPad may become very warm in normal use, the iPad should not become uncomfortably hot to handle. If your iPad is becoming too hot to hold, you should take your iPad along to the Genius Bar at your local Apple Store - where the technicians can examine and test your iPad for faults.

Genius Bar Reservation and Apple Support Options - Apple

The Apple Support Community (ASC) is a user-to-user technical form. Other than the site Moderators, Apple neither monitor nor participate within the Community. Contributors here are all end-users, just like you. As such comments posted here, that you intended for Apple, will miss your intended audience.

If you consider the issue to be a bug that requires fixing, Apple invite submission of Bug Reports via its Product Feedback portal. For iPad and iPadOS:

Feedback - iPad - Apple

You're very welcome.