That's interesting, DS applied for a lot of degree apprenticeships and a few level 4's, he got through to the next round in almost all the degree apprenticeships but was immediately rejected by all the level 4's. He probably applied to 15 - 20 positions total.
To add to the OP I would recommend having some questions to ask at the end of face to face interviews, DS always asked how likely there was to be a job at the end of the apprenticeship, a question about the programming languages used and then ended on what the best thing about working for the company was. I would also say make sure you've done a lot of (preferably relevant) things beyond A-levels that you can fill a CV with and draw on to answer questions - work experience, volunteering, EPQ, part time jobs, short courses, competitions, hobbies etc
I felt that the cv writing and interview experience was invaluable even if it didn't lead to a position tbh. DS did end up turning down some interviews to concentrate on others, as PP said it can get confusing to remember one companies details from another. Also the face to face interviews often fall around mocks time. I knew the whole experience would enable DS to see that if he ended up going to uni that he needed to ensure he was doing more than just his degree - so he had things to make him stand out from everyone else with a degree when it came to getting a job. I really noticed that the more interviews he did the more confident he became, he was extremely anxious the first time!
If you are doing engineering or comp sci there are lots of apprenticeships so ds was lucky and he found the perfect one for him. He found though that the whole process could be quite different from one company to another, Barclays was a complete shambles with the interviewer arriving late, completely disinterested, and unable to answer his questions - and after all that they were told the process was on hold and didn't hear anything else for weeks. At the other end of the spectrum JP Morgan was very supportive, polished and extremely well organised with excellent communication - it seemed like you could tell just from the process the companies where the apprenticeship was likely to be very organised and well supported.
I would also say start looking from early in Yr 13, they started advertising the first ones in October I think. DS signed for accommodation before he new he got the grades because he was confident he could get them and it was going to be much trickier trying to sort accommodation just a couple of weeks before he started.
I agree that degree apprenticeships are fantastic and there need to be loads more. But they do need to be good quality and kids need to make sure the company isn't going to lead them down a path that's going to narrow their options too much to give them good future prospects.