Exploring Website Patterns: Usability Studies and Best Practices

Hey. I'm discussing website updates with my team and I'm interested in exploring some other website patterns (like using accordions and tabbed "feature" blocks), to shorten our pages and allow the user to interact with the content in slightly different ways. One of my colleagues is pushing back and asking if there are studies I can cite on usability, or to give evidence on which formats are better for a user. I haven't really come across these in my career, but have shown the team examples across many sites (of larger and smaller companies). Just interested if other people have come across this situation and if there are methods or persuasion or data that you might use to help with these types of discussions?