RSS is a hosting company, and has no influence on whether or not Apple Podcasts will accept your RSS feed.
Apple Podcasts generally accepts feeds within 24 hours to 2 weeks. If you have not heard back from them within this time range, please reach out to them directly.
It's important to note, that you should only submit your RSS feed after you have tested it.
For a full list of free RSS Feed validators, please visit here.
For more information from Apple Podcasts on submitting your RSS Feed please visit: https://itunespartner.apple.com/podcasts/articles/submitting-your-show_testing