I hope you will consider branching out beyond those particular technologies. For example, I'm a Node dev who has done Angular and React before but would probably rather use Vue on the front end (if it's appropriate) these days. Also have a fair bit of Linux experience which might be an important skill (as well as C++ and many other technologies from 20+ years). And I am thinking I might focus more on AI by learning to use some of the high level APIs out there. I assume there is demand for that type of thing.
I guess one of the main difficult things about branching out beyond React etc. is, how can you necessarily do a weekly demo for something that really isn't visual or interactive or may not have a short term deliverable? I think the simplest answer is just some type of screen share or short video that shows the raw progress, for example just a run-through of data cleanup scripts highlighting some of the data issues being resolved.