After much hard work, the Yomichan developers have added proper support for pitch accent and provided a pitch accent dictionary. Until now, most people probably didn’t have a pitch accent dictionary in Yomichan, or if they did it would have been text only. Now Yomichan has official built in support, including three different pitch accent notations.
You can get the pitch accent dictionary from their github page.
Here’s an example of how it looks with two of the three notations enabled.