I was able to take this idea and also apply it to creating buttons in storymaps to use when creating bookmarks. It's a little bit of a cumbersome process, but within storymaps you are able to effectively create bookmarks by using a "Story Action" to zoom and pan to a specific location whenever the text is clicked in the description panel. When an action is created you can then go into the html source code and copy that code to be applied in the next step.
I then created a button from the resource in the original post and put place holders in for the fields required except for the text I wanted in the button. I then replaced the code that calls Survey123 with the code that is outputted when creating an Action within the storymap. The code should look something like this:
Notice the ACTION number. This appears to be the unique number generated when an action is created. Once an initial button is created the process can be repeated however rather than generating a new button from the GitHub resource, simply copy and paste the code from the first button and replace the ACTION number with the new ACTION number created when you repeat the initial step of creating a "bookmark" action within the description panel.
The end product looks something like this:
Without buttons:
With buttons:
Again, it's a clunky process but the difference between a button and simple text is worth the trouble, in my opinion.
To repeat the process:
1.) Create an action (in this example it's a bookmark or jump to location action but I'm assuming you could use the other options as well such as switch main stage, etc.) within the details page of a map within a storymap
2.) Create a button from the original post via GitHub using placeholder values for all fields except the text desired on the button
3.) Copy the button code into the html source code of the description of the map within the storymap
4.) Delete the first part of the code that calls Survey123 and replace it with the code from step 1 which includes the ACTION number.
The process can then be repeated by repeated step 1, copying the button code from step 4, and replacing the ACTION number and altering the desired text.