Well, I already applied the fabric, and I don't want tye expensive landscaping fabric to go to total waste, so I think the only option for me is to follow through with the top soil directly on top.
IMO the cost and labor to remove it after it becomes an issue would be worse. The sand (and the extra soil that presumably you'd be paying for) would be mingling with shreds of plastic.Do you think it's still okay if I still continue to use the landscaping fabric?
And later on just let the natural sand from my backyard and my top soil to come just come together on its own?
You could always repurpose the fabric for use in garden walkways or such, no need to let it go to waste. I have a whole roll of it in my garage too.