Hi Bellababe - are you taking Provera for 12 days monthly? If you are late peri-menopause or post-meno then maybe your womb lining is not building up sufficiently to need to be shed monthly? Also the amount of bleeding (and therefore womb-lining thickening) is dependent on oestrogen dose so if you are also on a low or med dose of gel then the same would apply ie not building up enough to shed.
Sorry I can't help in that I've never taken Provera....
However, the only other progestogens available separately are the Mirena coil ( delivers progestogen locally but with some systemic absorption), or utrogestan (progesterone itself) which is supposed to have the least androgenic effect. If taken orally though it can have sedative side effects and sometimes nausea although some of us (on this forum) take it vaginally off licence to minimise this.
The good news is, if you are feeling well on this dose of gel then you could possibly try for a longer cycle in view of your lack of bleed, which would decrease the duration of the Provera. However if you change progestogen type to Utrogestan, for the moment I would keep with the same length cycle ( ie monthly) in case it doesn't thin the lining quite as much as the Provera.
The progestogens available are listed here:
https://www.menopausematters.co.uk/to_progestogens.phpHurdity x