Wrong PhD project choice for PhD - stick it out, change, leave?
I am going to assume as a funded science PhD, you have something in the region of 3.5 years of funding.

You're only a year in, so it's not too late to change. There is even time for you to change completely (though it could be a lot of work to get done on time before your money runs out).

Typically I would say the first year of your PhD will involve you gaining useful knowledge and skills, though a project that may well not end up being what you write about in your thesis. It's your second and more the third year where you have the skills and can really do some research for your thesis.

Saying that, don't hang about! Organise a meeting with your supervisor asap to go over the options with them, they are given the position of supervisor as they should know how to steer their students to get a good PhD, but they can only help you if you tell them that you're not happy and what you want to do. You will have gained useful skills, so the time hasn't been wasted, but you do need to sort it out sooner rather than later.

I would hope there are other projects available you can move into, but the worst case scenario isn't the end of the world. Like you say with minimal effort you should be able to write up what you have done and get a Masters, then move on with that qualification and experience.