I would like to say that if the issue here is the fact that there are no direct instances of gods coming back from truenaming or the like, I would like to mention that (although it isn't on the profile anymore after I brought it up to Bambu, but given the precedent of Fusion Zamasu I think it still holds water) Asmodeus as Ahriman used to have high godly from coming back from the complete destruction of 4D space (which I do not exactly know the origin of, so if someone could provide it so I don't look like I'm speaking out of my ass here or am missing some context the scan itself would provide), which could be used for two different arguments for high godly.
1)If the feat in question means 4D space as 3D space + Time, which would be regen from history as the entire timeline was destroyed and logically coming back from that would be the aforementioned regen from all of history being nuked.
2)Would be the fact that as an abstract, having the reality in which your concept resides being nuked would be high godly as well, specifically from concept erasure.
Now while Asmodeus as Ahriman is an outlier when it comes to the power of "divine" figures, if the above is true, it would show that those on the divine level do in fact have the capacity to come back from some degree of fundamental erasure, which would indicate that coming back from unnaming is less out-there.