Add sidebar (with add to cart + product variations) to product detail page

We are migrating from Remy theme.
Remy theme offered the option to add a sidebar to product detail page to show add to cart and variations. (example: https://www.evyssecrets.com/product/tepelpiercing-in-chirurgisch-staal-zonnetje-met-verschillende-kristallen/)
Where do we find that option in Proteo theme?

Sincerely,
Joel

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