I mistakenly chose ‘forget this device’ for my lightning. Now I want to reconnect it again to my iPhone 8’s Bluetooth, but I cannot. I’ve done reset all the settings, but nothing change. I couldn’t hear anything thru my headset. Any ideas what to do?

Hi there, rizka209!

Thanks for reaching out to the Apple Support Communities! It sounds like you're having an issue pairing your headset back to your iPhone. Check out this article If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch. This article will give you the steps you can take for issues getting connected, and well as the next steps to take if you continue to have issues.

Have a great day!

Have you made sure the headset is in pairing mode? For security, many BT devices will become silent once paired and hence not be locatable by the phone.