TOPO is featured by high stability

is featured by 是個固定搭配，但根據英語語法來講，不是非常理解這個by high stability在句子中的成分。

TOPO is featured by high stability.
按被動語態理解，by 引出動作（feature）的施事者，介詞短語作狀語。
按系表結構理解，by 介詞短語作形容詞 featured 的補足語；或者把整個featured by high stability 看作表語。

這是英語中少有些等式（主動被動一個樣）：
A features B. = A is featured by B.
意思：A事物以B為特點 = A事物的特點由B體現，或體目前B上。

比如：

The original version featured a guitar solo.
原版以吉他獨奏為特點。
《柯林斯英漢雙解大詞典》
=The original version was featured by a guitar solo.