wide-ranging and diverse; multifarious
Yojijukugo describing something that branches out in many directions and is highly varied. Often used in formal or written contexts.
His hobbies are wide-ranging and diverse, covering everything from music to sports.
この会議では多岐多様な意見が出された。
A wide variety of opinions were expressed at this meeting.
多様 simply means 'diverse'; 多岐多様 adds the nuance of being wide-ranging and covering many distinct branches.
A yojijukugo combining 多岐 (many branches) and 多様 (many forms), emphasizing diversity across many areas.