I would like to suggest this functionality/plugin to the product team as you have progressed a lot in understanding the WPF structure and converting into working Html applications.
Many of the existing customers/companies may be interested in converting their WPF pages into Html pages and want to develop brand new Apps. targeting such customers, you should provide plugin/module that can emit the Html equivalent pages of the WPF pages, it doesnt need to be working version or extremely 100% styled as original WPF screen. Even if it matches 50% it is fine.
For my case I have 400+ WPF screens that needs to be converted to Html, it may take months to manually convert them into Html, I wish your tool should support just emitting plain html with basic CSS, where developer can work on optimizing it.