the verb 'enjoy'
Is enjoy a stative verb? Can I use it in continuous form. For example:
Sophie lives in Liverpool, but she enjoys / is enjoying her mid-term break in London at the moment.
Which one is correct?

Question

the verb 'enjoy'
Is enjoy a stative verb? Can I use it in continuous form. For example:
Sophie lives in Liverpool, but she enjoys / is enjoying her mid-term break in London at the moment. 
Which one is correct?

Answer

Enjoy is not a stative verb - it is often used in the continuous.
In your example 'is enjoying' is correct.

Answer

is enjoying  at the moment
enjoys - a general thing, not with "at the moment"

Answer

Yes, you can use it in continuous form, find more details here: https://learnenglish.britishcouncil.org/intermediate-grammar/stative-verbs