Basically fonts are copyrightable but typefaces are not. Font names are also trademarkable. https://glarts.org/font-and-typeface-legal-tip-sheet/
Most free clones are not as good in various ways, and good clones that are charged for probably get earn their creators a letter from a foundry's legal team that makes them decide that the cost (time and money) of defending their position (even though they should eventually win) is not worth it.