Among Pharasmins, "creating undead is forbidden, and controlling existing undead is frowned upon", and "all priests have a solemn duty to oppose such abominations [undead] where they find them."
These sort of rules are never said to be put in place by Pharasma. These are likely the traditional laws of her clergy. Pharasma herself "opposes undeath as a desecration of the memory of the flesh and a corruption of a soul's path on its journey to her judgement," and "encourages her followers to hunt undead, as the souls of the destroyed undead will then reach her for judgement."
So, Pharasma detests undeath because it prevents souls from reaching her, and wants because it desecrates the memory of the person the reanimated corpse used to be, but she advocates for the hunting of undead primarily to set their souls back on track. However, what if undead were neither corrupted souls nor desecrated bodies?
Mindless undead are without souls; they are simply animated by negative energy. With magic and dedication, such undead can avoid becoming desecrations, they just need to be taken care of.
If someone wants their bodies to continue to do good after death, and they consent to reanimation as a mindless undead, it's not disrespectful to them to do such a thing; it's not disrespectful to carry out the wishes of the dead. Such consent could even be gathered with Speak with Dead!
Letting a body rot away, however, is certainly a kind of disrespect to the person who once inhabited it. This has easy solutions. With those freshly dead and intact enough to restore injured areas with Mending, periodically cast Gentle Repose to prevent rotting. With those already rotted or beyond mending, cast Decompose Corpse to make them a perfectly clean skeleton. Give both types dark hooded robes (reminiscent of Pharasma herself) and blindfolds as well as anything else to retain their dignity and prevent them from being disturbing.
Here's the question:
If a separatist cleric of Pharasma were to advocate the control and even creation of undead like this, would Pharasma continue to grant the cleric power?
Background Info:
This separatist cleric used to be a moderate priestess of Urgathoa, who led a small hidden cult opposite the local Temple of Pharasma. She advocated for living life to the fullest and saw undeath as a helpful tool as well as a blessing. One encounter with the PCs later, she was pulled into helping with the local undead uprising. Once the crisis is averted, the local Pharasmin in charge begrudgingly spares her, but forces her to give up her cult and convert. The silver-tongued cultist figures that if she can't beat them, she may as well join them and reform them to be more reasonable.
I am the GM, and I realize this basically means I can do anything I want, but I was still curious whether Pharasma would *officially* tolerate this sort of interpretation of her teachings.
Sorry for all the text!