@Fightingfatigue No, we can’t achieve it using CSS code because of the current code structure. We need to only create separate section for it by custom code. Since collapsible content is already available by default in the theme, we can use it.
We can use collapsible rows only within the product information section, meanwhile collapsible content can be used anywhere. Example, we can use it to display FAQ section in any page.
Please let me know whether above solution worked for you. If it worked, please like and accept this comment, so that, it will be helpful for others who has same query.