Google search results thumbnail issue

Hi there,

I have an issue I'm trying to resolve regarding page thumbnails showing up in Google search results. I have some code block that worked for one of the pages, but I can't seem to get it to work properly on the other pages. I'm sharing the code block here for reference as well as the Google results not showing the thumbnail. 

Any insight would be AMAZING. I'm can't seem to figure this out.

<!--
  <PageMap>
    <DataObject type="thumbnail">
      <Attribute name="src" value="data-image="https://images.squarespace-cdn.com/content/v1/5e3c491c664a0f4ded40ab66/1630373448630-1J147LYAPB927EVGV1KO/20210828_NC_CraggyGardens_DanielleJake-346.jpg?format=1500w"/>
      <Attribute name="width" value="100"/>
      <Attribute name="height" value="130"/>
    </DataObject>
  </PageMap>
-->

<meta name="thumbnail" content="data-image="https://images.squarespace-cdn.com/content/v1/5e3c491c664a0f4ded40ab66/1630373448630-1J147LYAPB927EVGV1KO/20210828_NC_CraggyGardens_DanielleJake-346.jpg?format=1500w"/>