I think you should be able to read Bike files on iOS with anything, like a browser, which can read HTML files.
(The simplest route might be to make a copy with an .html extension, at which point previews should become legible, though more convenient workflows are probably possible )
If you want to be able to edit on iOS, as well as view, then saving your Bike files as OPML would be one solution at this stage.
See: What can I use to open / edit Bike files on iOS/iPad? - Bike - Hog Bay Software Support