Are the contents of PDF files indexed via O365?

I have been testing PDF files on Office 365.  The content of the PDF files do not appear to be indexed .. as no search results are found using any of the terms within the PDF file.  I have seen documentation that indexing should be occurring, and lots of threads that it does not.

So

1. When I load PDF files, are the contents indexed (similar to how the iFilter works on on premise)?

2. If not, any options? Any settings (can't find any), etc.

Thanks

jsk88