Hello and welcome to the Community @Lindsay_Patross!
The Gantt view will highlight the critical path based on the earliest and latest records from your dependencies - below is a quick example demonstrating this behavior (outlined in gold).
Since delays to earlier tasks (such as ‘Migrate existing tasks’ in this example would affect the timing of the final task (Set up weekly progress meeting), those earlier tasks are then considered critical to the last task remaining on schedule. Tasks which do not have a dependency link to the final task will be omitted from the critical path (such as ‘Confirm task timelines’).
I also recommend checking out our Gantt view support article for more details on Critical paths.
Let me know if I can help provide any more information, and if this helped answer your question please mark it as the solution .