Two different items I purchased for two different places, both have a label which includes a security chip. A $12 belt and a pair of athletic shorts. In both cases, a bright LED light shining through it can show the antenna and chip. Instead of a solid antenna, they often now are just foil and flexible.
I understand why stores are trying to reduce theft. It is just as easy to add a tag to a cheap item as an expensive one. However, the cheap ones have tags which have to be actively scanned and the power for the chip comes from the reader (by received RF power). Very expensive items are tracked by active tags which contain their own power source (I guess, similar to Air Tags and Tiles).
These passive tags could be (and may already be used) for checkout-less exits from stores.