What an interesting question to uncover.
Kat, have you tried
Tibolone? It is supposed to be the first line HRT for women who are intolerant to progestins, but doctors really don't care about progestin intolerant women, the more arrogant among them even speculate that we don't exist

instead of the more sensible self reported figure of 15-20% of women believe they are intolerant to progestins (and know it even if they haven't learned the word progestin yet, that was me for 40 years).
To answer the original question,
Tibolone is continuous and used as an HRT and I absolutely love it.I was offered the most awful HRT progestins while I wasn't allowed tibolone, I was fool enough to believe my GP that progesterone intolerance only occurs in younger women. No, it's incredibly awful in older age, worse than before as it happens because I'm not so used to it any more.
I go from happy (because I have a good life), to planning my suicide and deciding how to tell my kids I need to die, that's within about three days of starting most progestins. My GP's stern order? Don't stop taking it, it must be taken for 12 days otherwise you'll be at risk of the most sinister dangers of HRT.
No, the risk of suicide comes first, she's an idiot, it's obviously a mistake to cause a patient to become suicidal, don't double down and repeat.
But she did repeat, I've tried loads of them now and lost my last job in the process, I couldn't possibly work while on progestins, it was horrific. I will never put my trust in a doctor again after being led that unmerry dance.
Utrogestan is horrible for wind pains and no sleep because I was so wired on it. I felt all over the place emotionally on it, but it was the best of a bad bunch.
With Tibolone I don't get side effects
at all, unless you count things like more energy and renewed appetite for life as side effects.