Deploy the In-App guidance from one org to other using package xml

Can we deploy in-app guidance from one org to another org?

The answer is Yes, we can.

Component Type: Prompts.

Here is the package.xml to extract metadata.

<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
    <types>
    <members>*</members>
    <name>Prompt</name>
    </types>
    <version>46.0</version>
</Package>

Please refer salesforce doc for more details: https://developer.salesforce.com/docs/atlas.en-us.222.0.api_meta.meta/api_meta/meta_prompt.htm