Legendary audio engineer Johnsome has left Superior Sound Labs and started an independent firm, 請問這句是強調形容詞的到裝句嗎? 正常寫法不是形容詞 ＋ 動詞 ＋ 主語 嗎?

Not an Inverted construction:-
Johnston-----S--->who is Legendary audio engineer(an adjectival phrase defines or limits the noun S with a who-->an interrogative pronoun)
has left--------V
Superior Sound Lab.-------O
-------------------
Instance of this Inversion must used "inverting or being inverted"
eg:-Being inverted and being a legendary audio engineer leaving Superior Sound Lab, 
Johnson ---S
has left---V
to start a new firm.---grammar in non-finite form of a verb phrase used with to, meaning let Johnson start, allow Johnson to start

這非倒裝句吧。
{ [Legendary(adj.：修飾名詞) (audio engineer)名詞 ] Johnsome }(名詞or專有名詞) has left [Superior(adj.：修飾名詞) (Sound Labs名詞) ](名詞or 專有名詞)and started an [independent(adj.：修飾名詞) (firm名詞) ],