If I put “site:myriadrf.org Octave” into my search engine of choice, I see the information to possibly do what you think you want (I think, I do not use Octave, so not sure) from 2017, the files may be a bit dated, but they might still work.
I’m looking at this one in particular: https://wiki.myriadrf.org/LimeMicro_BT_MiniHackathon
And some of the files can be found here: https://downloads.myriadrf.org/workshops/
As for why no one has responded in 2 days, your thread was read 32 times in total, maybe the right person with knowledge about the LimeSDR and GNU Octave has not read it, or they just do not have time to respond.
As for how to use the LimeSDR API, you have full access to the entire source code of the LimeSDR, if you have a problem interfacing with the API, maybe read the source code ?