I want to run a campaign setting few hundreds years from current wildemount setting. The war had already ended and the knowledge of Dunamancy is spread widely.

Here the question, what are the dunamancy spells that could be access by other classes?

Officially? None.

Unofficially? Any or all as you see fit. Being arcane/learned would probably mean it would be limited to arcane spellcasting such as bard, sorcerer, wizard and warlock and possibly Cleric - Arcana domain.

Someone else actually created a table of what classes they think should be able to access what spells.

The thread can be found here

As the DM the world is your oyster, you can alter and adapt anything you like to fit your vision of the world.

Always worth letting the players know of major class changes at session 0 though, that way there's less confusion or hurt feeling from someone who wanted to be unique by being a wizard of one of the two existing schools that those spells are normally limited to. 

I'd say maybe a Warlock might gain it, especially if you do some weirdness and make their patron be the Luxon (dodecahedron).

A Lore Bard can gain spells from pretty much anywhere with that Magical Secrets feature.

The spells could possibly spread to over wizards over the years thanks to the ability to translate and write spells into their own books. 

Sorcerer might be one of the more tricky classes to give those spells to, you might need to develop a new bloodline that toys with Dunamancy. 

Quote from Davedamon >>

Someone else actually created a table of what classes they think should be able to access what spells.

The thread can be found here

 Thanks, this is helpful, I might tweak this a little bit, I don't think sorcerer should get access to all the dunamancy spells.