Is he's a singular possessive

Answer 1

No, the form he's is not a possessive form; he's is a contraction, a shortened form for he is or he has. The contraction he's is a pronoun-verb (or auxiliary verb) combination. Examples:

He is my favorite actor. Or: He's my favorite actor.

He has been in some good movies. Or: He's been in some good movies.

Possessive pronouns do not use an apostrophe to show possession. The possessive forms of pronouns are specific words or specific use of words.

A possessive pronoun takes the place of a noun that belongs to someone or something:

The house on the corner is his.

A possessive adjective is placed just before a noun to show that the noun belongs to someone or something:

His house is on the corner.

Answer 2

No, "he's" is a contraction of "he is" or "he has," not a possessive form. The singular possessive form of "he" is "his."