RF64 is a BWF extension! IOW, a RF64 file is a BWF file and of course can contain meta data.
Maybe SoundBlade is not capable of reading such files, but then this is another problem.
And don’t missunderstand RF64 and RIFF64.
RF64 is a BWF extension, while RIFF64 is an old proposal done by SonicFoundry, still in use, but obsolete and deprecated, I would say.