Lists do not contain only <li> elements and script supporting elements (<script> and <template>)
The only thing that you are likely to put in a list that is not text is a text link. These are often used for menus. This is fine. With Webflow you can't "accidently" put the wrong type of element in a list.
Google Lighthouse says
Screen readers and other assistive technologies depend on lists being structured properly to keep users informed of content within the lists. The only content lists should contain should be within