If Amazon is currently selling Phantom 4 Pro, why does it not broadcast Remote ID?

It appears to have been discontinued. But I'm sure DJI or some third party will make a Remote ID add-on. You don't need it yet.

Hi, WA4OSH. Thank you for your feedback. According to the FAR Part 89 Remote ID regulations, RID compliance for American users starts on September 16, 2023. Before that, the FAA RID regulation does not affect the user’s flight activity. DJI will conduct an evaluation and prepare appropriate plans for different aircraft after the RID technical standards and MOC recognized by FAA are issued. Thank you for your kind understanding.

DJI Gamora Posted at 2-5 00:09
Hi, WA4OSH. Thank you for your feedback. According to the FAR Part 89 Remote ID regulations, RID compliance for American users starts on September 16, 2023. Before that, the FAA RID regulation does not affect the user’s flight activity. DJI will conduct an evaluation and prepare appropriate plans for different aircraft after the RID technical standards and MOC recognized by FAA are issued. Thank you for your kind understanding.

So the Phantom 4 Pros that are being sold were manufactured before September 16, 2022?

§ 89.510 Production requirements for unmanned aircraft produced under a design approval or production approval issued under part 21 of this chapter.

After September 16, 2022, no person may produce an unmanned aircraft for operation in the airspace of the United States under a design approval or production approval issued under part 21 of this chapter unless:

(a) All applicable requirements of part 21 of this chapter are met; and

(b) The unmanned aircraft is -

(1) Designed and produced to meet the minimum performance requirements for standard remote identification unmanned aircraft established in § 89.310 in accordance with an FAA-accepted means of compliance; or

(2) Equipped with Automatic Dependent Surveillance-Broadcast (ADS-B) Out equipment that meets the requirements of § 91.225 of this chapter.

WA4OSH Posted at 2-5 01:12
So the Phantom 4 Pros that are being sold were manufactured before September 16, 2022?

§ 89.510 Production requirements for unmanned aircraft produced under a design approval or production approval issued under part 21 of this chapter.

Hi, WA4OSH. Thank you for the reply. Yes, the Phantom 4 PRo's were manufactured before September 16, 2022.