Most universities and courses are offering ABB or whatever. Grade is more important than subject choice - unless it is something like medicine you are intending to do that requires Chemistry, for eg. The majority of courses do not specify what A level subjects you must have.
That’s a bit glib though.
Lots courses offer at ABB or thereabouts (AAB/BBB). But masses of others offer at AAA. Or Astar AA. And some offer a lot lower like 96 UCAS points.
And I cannot agree with the last sentence – there are certainly a good number of courses that do not require specific A levels for obvious reasons - things like criminology or journalism or law or social policy. But there are masses that do specify. I would be willing to bet that those are in the majority.
Every year there are parents on MN whose DC have realised that they want to do engineering and should have done physics A level. Or medicine and chemistry. Good luck getting a degree place to do maths, biology, engineering, chemistry, physics, Eng lit, French, German, Spanish, economics, CS, medcine, vet sci, dentistry (and other choices for sure) without specific A levels.
Anyway @inthisvehicle to answer your question, in my subject (MFL) GCSE grades are key, and also I would seek to find out if the student had a specific aim post A level; yes encouraging MFL post 16 would be in my mind (I no longer teach in school but if I still did) as it is woefully undersubscribed. 5 & 6 would not be something I would consider (I know nothing about 6 tbh); 7 only in terms of the student’s possible aims for the future again. An MFL A level or MFL degree is always going to be worth doing (assuming the student is not aiming for a uni course which requires three different A levels, like engineering) and I would never advise a student keen on MFL A level that they should study physics and maths and do engineering at uni so they could be sure of a good job if that was not where there interests lay. If that's what you mean OP.