Rules for writers, Tenth edition - Diana Hacker, Nancy Sommers 2021

Do not use a comma after a phrase that begins an inverted sentence
Unnecessary commas
Punctuation

Though a comma belongs after most introductory phrases (see 33b), it does not belong after phrases that begin an inverted sentence. In an inverted sentence, the subject follows the verb, and a phrase that ordinarily would follow the verb is moved to the beginning.