Arxiv is flooded with ML papers. Github has a lot of prototypes for them. I'd say it's pretty normal with some companies not sharing for perceived, competitive advantage. Perceived because it may or may not be real vs published prototypes.

We post a lot of research on mlscaling sub if you want to look back through them.

https://www.reddit.com/r/t5_3bzqh1/s/yml1o2ER33