Use grid for an EPUB export?

I am publishing a print and an ebook version of a book about music. I have occasion to present analytical representations of song lyrics - example attached. I know nothing about InDesign, but that is the tool my book designer is using. She/we are having difficulty getting the alignment to come out right in the EPUB file InDesign exports. I have looked at the html and stylesheet in the EPUB file (using Calibre), and I can see she is flailing. I believe if someone were doing this for a web page, they would use a CSS grid layout. My understanding is that InDesign has equivalent grid functionality, and my instinct is that is what we should be using, but the designer doesn't seem familiar with the grid functionality in InDesign, at least for this purpose. I am posting this to ask what would be the appropriate tool/functionality in InDesign to get the alignment right in the EPUB output. (Feel free to answer using InDesign specific terminology, as I will be passing this on to her anyway.)