I wish these supposed jobs existed when I finished my degree for going into cybersecurity, unfortunately EVERY "entry level" job required 3-5 years experience. It's probably exactly the same today. Now I work in electrical engineering, because the position requested (not required) a background in IT and my hobbyist experience was enough to satisfy the rest of the requirements.
No idea why they hired someone brand for senior.
I guess for a while I explained it as “senior” and “junior” not necessarily being descriptive.
Now I think it’s that I had related experience (I had been a teacher, and training/mentoring is a big part of the job.)