Hey there Silam,
That’s too soon IMHO. In my mind, there is a wide gulf between level 20 characters and gods.
Depends on the power of the god.
For starters you have Hero-deities and Quasi-deities (Divine Ranks 1 and 2 respectively) which are 'Godlings' that likely still dwell on the mortal plane.
These would be beings like Kelanen and Melf, or the Simbul, Tasha, Elminster, etc.
Then you have Demigods (Divine Rank 3) on par with Demon Lords, Dukes of Hell, and so forth.
That gulf is made up of a lot of epic levels.
Unnecessary book-keeping that will more often than not needlessly complicate your game. Plus the micro-managing of individual levels beyond 20 always gives ever diminishing returns.
For example at a hypothetical level 21 is a 4.76% increase in power, level 31 is a 3.22% increase in power, level 41 is a 2.43% difference. There is no meaningful difference.
Whereas each Divine Rank is roughly a 50% increase in power.
This way you get meaningful change at each rank - you can have Thor, Thanos, Goku or whatever without compromising power. If you want planet busting Galactus or Frieza you can have that...in fact I did a Challenge Rating 52 version of Frieza in the previews thread.