16e charging slow while tethered

Search for accessories that have completed MFi certification. Once an accessory has completed MFi certification requirements and is reported to Apple as sold/distributed, it will be searchable in our public database of authorized Lightning, headset, charging, iAP-enabled, and Find My network-enabled accessories.

Learn how to identify counterfeit or uncertified Lightning-based accessories.

Follow these steps:

• Remove any debris from the charging port on the bottom of your device.
• Restart your iPhone or iPod touch.
• Try a different USB cable or charger.
• Make sure you have the latest version of iOS.

If your iPhone or iPod touch won't charge - Apple Support (IN)

You can fast charge your iPhone 8 or later up to 50 per cent battery in around 30 minutes. Find testing information for various iPhone models.

To fast charge, you need an iPhone 15 or later with a USB-C cable, such as the one that came in the box, or an earlier iPhone model with a USB-C to Lightning cable and one of these adapters:

• Apple 18W* or greater USB-C Power Adapter
• A comparable third-party USB-C power adapter that supports USB Power Delivery (USB-PD)

Fast charge your iPhone

The problem is that most laptops give 5v at 3w. the 2020 se has a smaller battery which is why it charges faster. the 16e takes up to 5v at 29w. that is why you are getting the slow speed.