Hi there
I also did foundation maths. So long as you're doing higher biology and chemistry you should be OK otherwise enrollment onto such A levels would be a challenge.
University wise some courses do require 6/7s in maths so just a heads up. I had to resit GCSE maths at higher tier for my course. So it depends on your future career plans - doing higher tier does keep more options open.
Best wishes with your other mocks.