Google enforces a SEO penalty on duplicated content and URLs. Your WordPress site's staging and production environment are hosted under .dev.onpressidium.com and onpressidium.com with a mapped domain, so this could potentially create problems with SEO.
In order to address this, we restrict all web crawlers from indexing anything that originates from *.onpressidium.com (This includes your staging). We also inject a X-Robots-Tag HTTP header in every response for extra measure.
Only the WordPress site that is mapped on your domain (for example https://acmeshop.com) will get indexed, thus allowing you to break things on staging, without any fear of having your SEO score impacted.
Open a support request if you have any questions, or a particular use-case you would like us to discuss.