Is APPTS a Wordle Word?

Yes. APPTS is a valid Wordle word.

It is not on the Wordle answer list, so it is unlikely to be a daily answer.

Plurals ending in S are almost never chosen as Wordle answers.

What does APPTS mean?

The act of appointing a person to hold an office or to have a position of trust“His appointment was deemed suitable”
The state of being appointed to a service or office; an office to which one is appointed“the appointment of treasurer”
Stipulation; agreement; the act of fixing by mutual agreement.

7 more noun definitions

An arrangement between people to meet; an engagement.“I'm leaving work early because I have a doctor's appointment.”
Decree; direction; established order or constitution.“To submit to the divine appointments.”
The exercise of the power of designating (under a power of appointment) a person to enjoy an estate or other specific property; also, the instrument by which the designation is made.
The assignment of a person by an official to perform a duty, such as a presidential appointment of a judge to a court.
(now in the plural) Equipment, furniture.
A honorary part or exercise, as an oration, etc., at a public exhibition of a college.“to have an appointment”
The allowance paid to a public officer.

Definition from Wiktionary, available under the CC BY-SA license.

Starter word rating: WeakIn the top 65% of all valid Wordle words for testing common letters.
Vowels: A
Unique letters: 4 of 5Repeats P
Common letters: A, T

Letter ratings use how often each letter appears in Wordle answers.

Tap its tiles to the colours Wordle showed, and the Wordle Solver lists every word that still fits, with the best next guess.