So i did try all the suggestions and unfortunately, none worked.
Further digging through archives and searches seems to indicate this is a long standing issue with trying to import items from Google Keep, which I neglected to mention. So, my apologies for wasting time with an issue that's been around for a while.
In the end, I think I'm stuck sharing individual notes via the Android app from within Keep, which works perfectly, except for the fact that it has to be one at a time. Still, isn't that many at the moment and I should be able to transfer over what I need.