Smooth Collapsable rows that don't move page

[MWxx]

Hello,

I am trying to find a way to make the collapsible rows open smoothly.

There is also an issue when they expand it makes everything on the page move too.

Here is a good example of the collapsible rows that open smooth and don't move the page.

https://rhythmlivin.com/collections/womens-t-shirts/products/dance-vintage-crew-tee-incense-oct23

I am using the Dawn theme. But if there is a better theme for this I am open to using that.

Thank you for any help.