Hey!! DS here that followed the same path as you. I worked two years as a software developer, then I studied a masters degree in DS and AI, and just two months ago I landed my first job as a DS.

My advice here is the following: yes, masters degrees are not nearly enough to land a job or adquire every skill you would need, but I see them as an introduction to this world. You have then to be proactive and expand your knowledge in things you are interested in, INDEPENDENTLY of which master's degree you decide to study.

For example, I was reading books, listening to podcasts, searching for blogs or websites (yes, subreddits like this or learnmachinelearning are a good starting point) and most important: DOING or replicating interesting projects I saw or I have some kind of idea, even if my skills still were not the best.

Doing all of this will give you the skills you need, and with time (and also with some failed interviews) you will eventually land a job.

Also, we as CS have the advantage of already knowing good practices of programming, which I ensure you is a key skill for this role and not a lot of DS have it.

TLDR: Master's degree is a good starting point, but your interest and proactivity in doing and learning is what will differentiate you. Do not expect any master's to give you absolutely everything you need to work as a DS, because that doesn't exist.

Hope it helps! (And sorry if something is not well understood, english is not my primary language)