You have a set of BDD feature files written in the Gherkin language but your stakeholders don’t like the text-only format. Plus, they don’t want to open each feature file one by one to go through it. Start using Pickles, it generates a document containing all features in a single document in just one step and it’s an opensource too.
Pickles has a lot of other ways and parameters, do check more details here:
http://docs.picklesdoc.com/en/latest, https://github.com/picklesdoc/pickles, and https://www.picklesdoc.com/#
P.S. It can generate your documentation in a variety of formats like JSON, Excel, Word, etc. and not only HTML.