Since I have a lot to type, because I'm giving all the details I can think of, I made it into a discussion.

I had this mod active for three new characters (separately) and all three of those new modded characters (that I never played before), they didn't have their ascensions unlocked. At the time of the third character, I closed the game, relaunched it without this mod (and nothing else changed) and bam, all the Ascensions were unlocked.

To elaborate more, I generally subscribe to any new modded character that I haven't played before. When I launch the game, I have like 30ish mods always active -> and on top of that, I add one new character mod. I play the game with the character -> eventually, I'm done with the character, I close the game, unsubscribe from the mod, give it a thumbs up or down -> next time I play the game, I use a new character.

I downloaded this mod because it seems ideal for my situation, but when I tried playing a new character, there was a complete lack of Ascension levels for the new character. The vanilla characters were fine. I thought it was just this specific character... oh well. After beating the game with the character, I unlocked Ascension 1...

Second character, same thing. Third character, still no ascension option. I decided to try removing this mod, because it was the only thing that changed recently -> and bam, the ascensions are available again.

So, here I am telling you about it. It might not even be an issue between this mod and Ascension Unlocker -> but it could be a result that randomly happened when I added this mod to my 30ish mods that I always run.
It's like I have a stew bubbling away in my pot and randomly, whacky results happen when I add non-character mods.

Thankfully, my computer doesn't need this mod to run the game with all my mods, so I'm not particularly upset. I just wanna inform you.