can I install iOS updates for iPhone 8plus

Update your iPhone, iPad, or iPod touch

• If you have an iPhone 8 plus, you can update to 16.7.7

Go to Settings > General > Software Update.

This link will show you how to update your iPhone, iPad, or iPod touch using WiFi -

Update your iPhone or iPad - Apple Support

This link will show you how to update using your computer -

Update iOS on iPhone - Apple Support