There is no walkie talkie app on my apple watch and I can’t download it from the App Store

Is your iPhone or Watch originally from a country where Walkie-Talkie or FaceTime is (or was) not permissible?

From UAE or China mainland, for instance?

What is the iPhone model number?

Identify your iPhone model - Apple Support

Find the model number of your iPhone, iPad, or iPod touch - Apple Support

Is any of Parental Controls, Focus, or Screen Time enabled here?

First confirm that the Walkie-Talkie feature is available in your country:

watchOS - Feature Availability - Apple

If so, then you're probably not looking at the correct Walkie-Talkie app when you search the App Store from your Watch. Make sure you search for "Walkie-Talkie" and that the one you select is the one from Apple themselves; that one works only on the Apple Watch and will be listed as "Utilities"

Regards.

Regards.

If you are in a mess like this, unpair the watch and set up as New Watch.

I suspect being from China has this blocked, as this feature is not available there.

You set it up as New Watch. You must not use the backup.

Ensure Facetime and Messages both work.

"Then I tried to download it on my Apple Watch and it says that it requires iPhone."

Are you saying your Watch is not paired to an iPhone? Are you saying it is standalone?

There should be no requirement for an iPhone if it is paired to the Watch. In addition the walkie-talkie app is installed by default and you should not have to download it.

Is there something you’re not telling us? Did you delete the walkie-talkie app? Is your Watch used?

Something not’s right about your situation.

What country?