Haven’t tested this out myself, but have a look in the Base: Dino_Character_BP Blueprint See attached picture.
Look for the value: Dino Base Level Weight Entries.
Currently it provides entries up to level 30. Together with the difficulty slider when you start the game, this scales to whatever level you want.
If I’m not mistaken: a difficulty of 1: allows spawning of dinos up to level 120. So a factor 4.
If you want level 240 dinos. You can either adjust the difficulty setting to 2. Or alter the Base level entries.
The latter will also give you more control of the chance of a certain level spawning.
However I do think this will require a TC. Or a whole lot of copy/pasting and remapping of dinos to pull off (as you will need to alter every dino character blueprint
