tab section accessibility, focus, tab index

My client hired a company to run an accessibility review and one of the items they flagged was the Tab Section. For keyboard users and screen readers, the focus cycles through all the tabs first and then down into the clickable elements in the body area of each tab, which can leave the user focusing on clickable elements that are off-screen and/or shifting the page sideways in a disorienting way where the tabs are no longer visible. Is there any way we might be able to get the focus to go from the first tab down into the clickable elements in that first tab before going to the second tab, or any other way you can think to make our Tab Section element more accessible? I set up a test page at https://abodedev.wpengine.com/test/ (hosted on WPengine) — if you’re not sure what I’m referring to, hopefully you can tab through that example and see what I mean. Thanks again and lmk if you have any questions or want access to that dev site.