Its entirely up to each school/college what they use for UCAS predicted grades.
They might use end-of-Y12 grades, or specific mock exams or just teacher intuition.
You still have time to pull your grades up - if you want it badly enough.
Go and talk to specific subject teachers and ask for their help and advice - ask 'what do I need to do...?'
If you work your socks off (really work, don't just play at it), by the end of next term/start of Y13, would they reconsider your grades?
Remember, the UCAS deadline is not until January 2026 and whatever artificial earlier deadline your school sets, you can still apply up to the real deadline date in January. This gives you 9 months to get this all together.
What is the course at Bath?