Yes, she gets an additional £1k side hustle/trading personal allowance.
Everyone gets the big standard 12,570 + any tax benefits like uniform, working from home, work licenses allowances.
People earning less than 50k, gets 1k interest allowance from savings in non isa account, known as personal saving allowance.
You are allowed 1k from dividends from shares that you own.. and some premium bonds payments are considered as dividends while some ain’t.
And your allow 1k side hustle, selling junk on fleabay, babysitting, renting your lawnmower.. allowance.
The main thing is that all your taxable income needs to be below the threshold, else you may have to pay additional income tax.
Edit: and 6k or 3k from next April for capital gains.. when you sells something for more than your brought it for, with in a set period of time.