Does phaserjs support 3d at all

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PhaserJS-3 does have a 3D camera / perspective camera too.

No, both Phaser 2 and Phaser 3 do not include any "real" 3d elements and there are no signs that they will be added soon or ever.

However, the creator of Phaser published the Phaser 3D class in the April 2019 Phaser Backer Examples (for patreons only) which allows to easily integrate some 3d elements from three.js.

There is also an example how to integrate three.js inside Phaser 3 in the official Phaser 3 examples.

In the past few weeks I have developed a 3D objects and physics extension for Phaser 3. You will find it at enable3d.io.

No, phaser is almost strictly a 2D game engine. Sorry.

If you do plan to make a 3D game I would suggest bablyon.js (http://www.babylonjs.com/) which obviously is slightly more complex than phaser but still supports 3D.