Is the deep forest location listed in the Coral Island Guide the River Forest on the map on the Wiki?
#Deep Forest
crisp heart
mental aspen
Deep Forest is a diff area of map which doesnt have map portrait artwork in existence
its over in the topleft further in grey area above mid forest
once you have 14 offerings completed Deep Forest access will unlock overnight 
(althought its overnight cutscene is bugged & play early right now, around offering 12 or so, which means youll be seeing the unlock magic before the area actually opens - known bug patch in progress) 😅
crisp heart
Ohh is it the area with the monkeys and King Tan?
mental aspen
correct!!