You have no easy options.
Local authorities keep lists of childminders. You will have to get the list and call the childminders up one by one and try to find one who will do the school pick up at 6pm. Good luck with that, I think you will struggle, but you just have to buckle down and you might get lucky. Been there, done that.
There are some after-school programmes that will run until 9pm, but not many. You will spend many many hours searching. Been there, done that.
This is very difficult, but if you just keep at it you will find a solution. You might end up paying for more childcare than you use, that was my experience e.g. if you do get a childminder willing to accommodate you, you will probably have to pay her for 5 days a week even though there might be (many) times you are able to pick your dd and not need help. Or you might end up paying for an after-school (6-9pm) slot that you don't want to use every day. Most spaces must be paid for in blocks, they don't allow you to say that you need them 'sometimes'.
The trouble I found with late daycare is that you will want to use it only in emergencies when you get held up at work, nobody wants their dd out in daycare until late every day. But nobody will accommodate you for emergencies - well, some people will advertise that they are available for 'emergency' care but I never found this reliable. Better to pay for a 'space' that is guaranteed yours.
I've been there, I sympathize. Ultimately it's important that you work, so I hope you find a solution for your dd.