however, not sure if it's just me. there's no high ground advantage in solasta? i don't seems to get advantage when firing arrows from elevation.
You don't have advantage if you're higher nor in Solasta, nor in BG3, nor in DnD5e.
You usually gain advantage or disadvantage through the use of special abilities, actions, or spells. [...] The DM can also decide that circumstances influence a roll in one direction or the other and grant advantage or impose disadvantage as a result. (PHB 173)
Consider granting advantage when: Circumstances not related to a creature's inherent capabilities provide it with an edge. Some aspect of the environment contributes to the character's chance of success. (DMG 239)
Performed a search and found this. "Some aspect of the environment contributes to the character's chance of success" perhaps i misunderstood this part for getting advantage. However, In BG3, they grant +2 to attack correct me if i'm wrong?