There are a few things you can do to make your podcast more visible in Google searches.
First, make sure your podcast is registered with iTunes. You can do this by following these instructions: https://support.apple.com/en-us/HT201314.
Next, make sure you have a good, keyword-rich description of your show on your website or blog. Include a link to your podcast feed on your site so Google can easily find it.
Finally, promote your show on social media and other online platforms. The more people who are aware of your podcast, the more likely it is to show up in Google searches.