It sounds like you’re in need of a page template for your products. Shopify allows you to assign a consistent template across all your products directly from the product page, please refer to below screenshot.
To create a new product page template, please go to your theme editor and follow these steps:
Select ‘Products’ from the top bar.
Click on ‘Create template’.
This will enable you to design a template that can be applied to multiple products, ensuring a uniform look and feel across your store.
If you have any further questions or need assistance with the process, feel free to reach out!