Have you shared this concern with the people you seek employment with and offered them a method to demonstrate your knowledge or addressed this point with them directly. Lying is not the basis to start a new role, it will catch you out.
I have. Hence the thread. They obviously never tell you the reason they choose that particular person over you, but feedback has always been that they found someone who had more "office" experience. Like I'm some tool whose never worked in an office before. Having freelance experience to me, I thought would be a star for being able to run your own business but its feels that it seems like a stain on my cv.
I can only speculate these examples as they aren't forth coming in telling you your downfalls.