Phoenix does not support LN addresses so it is not possible to use it for zaps afaik.
I'm not sure if it would be suitable for zaps anyway because the Phoenix app runs as a node on your phone, and is only online when you open it and for as long as it runs in the background. If it's not running then it's offline and I don't think you can receive anything (though I've never tested it).
Thanks for the great answer, is there an easy way to set it up?
If you aren't in the US then Wallet of Satoshi is probably the easiest and most reliable.
I am using Minibits which has been pretty good too, but not as easy to set up.
Another option would be https://getalby.com/
All of these are custodial, I'm not sure there's an easy way to receive zaps non-custodial if you don't run your own node.
