Like Dotty says, you can't really take the POP pill as HRT progesterone.
You can take the POP alongside HRT if you need contraception or if you (like me) have endo and need to suppress your ovaries(!) but you can't take just the POP....you'd need a HRT progesterone as well.
There was one study where they had a small number of women and they used double the desogestrel POP dose and found it was effective - but because it was just a small study they can't recommend that yet as an option.