Materialize/doc/user/layouts/shortcodes/debezium-json.html

<div class="note">
  <strong class="gutter">NOTE:</strong> Currently, Materialize only supports Avro-encoded Debezium records. If you're interested in JSON support, please reach out in the community Slack or submit a <a href="https://github.com/MaterializeInc/materialize/discussions/new?category=feature-requests">feature request</a>.
</div>