Hello Allisgreat,
Thank you for posting in Apple Support communities. We understand that you are having issues with your iPhone SE heating during normal use. Although you asked the "Apple team" to resolve this we want you to know that this is a support community with other Apple users not the "Apple team" but we would love to help you with this.
This resource will give you information on safety and heating: Keeping iPhone, iPad, and iPod touch within acceptable operating temperatures
This resource talks about the iPhone battery management: iPhone Battery and Performance
If you continue to experience issues you may need to contact Apple Support: Contact Apple Support to have diagnostics ran on your device.
Thank you for allowing us to support you.
Have an awesome and productive day!