It completely depends on what course your applying for and what university your applying to. For example, for entry onto BSc Biology, Exeter will accept both A-Level psychology and Geography as science subjects.
Outside the biological sciences, I don't think psychology would be accepted as a science for many universities .
Geography isn't any of those.
Psychology is a social science (Psychology, Economics, Political), not a natural science (Chemistry, Biology, Physics) so it's not really considered STEM.
However, for UK degree admissions both can be considered a "science" subject potentially by some courses. Psychology degrees often specify they will consider A-level Psychology as a science subject when offered with (an)other natural science/maths subject(s), and earth sciences/geology degrees likewise with A-level Geography. However usually if a course specifies it requires a science subject (or subjects), it means the core sciences (physics, chemistry, biology) and sometimes may include maths (and further maths) in that grouping as well.
However, in terms of A-Level, I'd say neither are normally considered to be STEM subjects.
I can understand the confusion with psychology but geography is a big no no