Found the Qweb named website_sale.shop_product_image and adjusted the t-fields to be "product_image.image_1920".

Hi,

To change the initial image size in your Odoo product page carousel, start by enabling developer mode and inspecting the image element in your browser to identify the relevant QWeb template. Analyze the src attribute of the <img> tag, which likely uses t-attf-src and references an image field or the resize helper.

Modify the template by either using a different pre-generated thumbnail field (e.g., product.image_512) or adjusting the width and height parameters in the resize helper. Clear the cache after making changes. For best practice, inherit the template instead of directly modifying core Odoo templates.

* <img t-att-src="image_data_stream('product.image', product, width=1024, height=768)" />

* <img t-attf-src="/web/image/product.template/{{product.id}}/image?width=1024&amp;height=1024" />

Hope it helps