The mailing list option is not enabled by default, so you'll have to enable this feature if you'd like for it to be presented on the Live Kiosk. However, you can opt to subscribe donors by default once this option has been enabled.
Please follow the steps below:
Step 1:
On your In-Person Campaigns page, click the "Edit" icon on your desired In-Person campaign.
Step 2:
Click on "Mailing List."
Step 3:
Toggle the option to enable this feature, include a short message to your donors, and subscribe donors by default if you'd prefer. Don't forget to click on "Save Changes" once you're done.
The changes should now reflect on your campaign, and donors can always reach out if they'd like to be removed from your mailing list.