Custom Magento 2.4 Functionality

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You will not have access to admin, ftp or backend. You will need to produce the files for the customisation that I can place in the appropriate directory in the magento install.
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I would like to add a single Grouped or Configurable product to a CMS page in magento.

I would like to be able to add the product in a similar format:
{{block class="company\modname\Block\Home\groupprod" name="bts_hardcover" product_id="1" image_width="300" image_height="300" template="product.phtml"}}

That way I can add the product to any page and also add multiple products to a page with the final result looking like the image attached.

I am also prepared to pay for a solution if you can guide me to do this without development if it is at all possible.