Hi Dannymac22,
We appreciate you reaching out to us. We understand that you are looking for a way to get a more accurate reading on the Compass app of your iPhone SE.
We recommend that you make sure that you are using the latest version of iOS 14 or the latest version iOS 15.
While it isn't inherently assured that an update will resolve the issue, updating to the latest version of iOS for your device can help isolate potential software issues.Â
Kindly secure a backup and update.
How to back up your iPhone, iPad, and iPod touch
Update your iPhone, iPad, or iPod touch
Also, we recommend that you check if there is any improvement if you remove any accessories on your device.
Some accessories may affect the iPhone's sensors.
If your device is already up to date and you do not have any accessories on your device, we'd like to hear about your experience.
We strive to bring the best personal computing experience to customers around the world through our innovative hardware, software and Internet offerings.Â
We welcome your feedback on our products here:Â Product Feedback - Apple
Take care!