Talk to your advisor.

Over the seven years of my PhD (Physics), I was first or second author on less than 5 papers (3 iirc). However, I am really happy with the quality of those few papers, and so were the reviewers on my thesis and, ultimately, my employer after I defended. Unless you want to stay in academia and become a professor, the quantity is not that important.

Have a frank conversation with your advisor. If you are out of ideas, I bet they aren’t. You are a student, not an independent researcher, so the expectation should not be that you are the sole driver behind the direction of your work. As a personal anecdote, I majorly changed the direction of my thesis after about three years in because the experiments were just really not working. It led to my degree taking longer, but I was seriously lost in the wilderness of discovery until I had a series of discussions with my advisor about where we could pivot the work that I had already done.