Private tutor predicted grades

Is my tutor eligible to give me predicted grades for my ucas application by giving me a mock test?

The person (or school / college) which you nominate as your referee needs to enter the predicted grades into UCAS. If your tutor will be your referee, then they will be expected to enter your predicted grades. If they use a mock test to gather evidence for those predictions, then that's fine.

If your school / college is you referee, then they would expect to enter their own predictions rather than those of your tutor.

I am a private student, I found my tutor online. My tutor isn’t associated with any tutoring companies. Would that be acceptable?