There's no delivery or shipping field on Wishpicks, so any note about delivery goes in a wish's free-text description or notes. Keep that note neutral and share your real address privately.
The text on the list is there to nudge, nothing more. Anyone who can open the list can read it, and by default that's anyone who's been sent the link.
Steps
Open the wish you want to add a note to.
In the description or notes, write one short line, like "Message me for delivery details" or "Happy to share my address directly."
Save the wish.
When a gifter gets in touch, send the real details by text, chat, or email.
What not to put on the list
Your home or work address, postal code, recipient name, phone number, and anything else you'd rather a stranger with the link didn't read.
Good to know
A wish has no separate quantity, size, or color field either. If those matter, put them in the same description or notes.
The note a gifter leaves when reserving is hidden from you, so it can't carry details back to you.
Related
"Is my address visible to everyone?"
"How to safely share delivery details"