Can I use my iPhone 8plus to charge my iPhone 11 Pro?

The answer to all of your questions, in your post, is a NO.

Axel F.

MariaPringle Said:

"Can I use my iPhone 8plus to charge my iPhone 11 Pro?: How does power share work? Is that a feature we have on iPhones? Can I download an app or something to make my phone perform this action? sorry. Me dumbs."

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Sounds like a cool feature.

Recommend to Apple:

Do your Part: These are user-to-user forums. Apple rarely reads these forums on their own time as it is. So, not being an option, provide Apple with feedback on this.  Apple wont get back to you directly, but the more they hear of this, the more they will know what is going on, and what needs to be fixed.

To Provide Feedback:

1. Go Here: Feedback - iPhone - Apple
2. Select: "Feature Request" for the "Feedback Type"
3. Comment: on that you want this to be an option, and how it can help others
4. Proceed form there as necessary