I have a little lever that opens the lens cover, with an audible “snick.” And if I want to use the telephoto setting, there’s a “whir.”
Wednesday is nervous when we have anything in our hands, anyway ... after all, we might be planning to brush her or trim her claws!
Use some kid noise as a background. You must have a kid or two around that make more noise than a camera and that the cat is use to hearing.