It is coming on v17.4 !

you can find the release notes for v17.4, and it says this:

Show product templates instead of variants in the "Products" building block, if desired.

It is currently on 'test' mode, so I am patiently waiting :)

Hi,

You can use the Website Hide Variants module from the Odoo App Store.

To hide the variant from the website so that your products will not show size variants

Here is the link to the app:

https://apps.odoo.com/apps/modules/16.0/website_hide_variants/

Hope it helps