It has already been reported here, but I would like to share that I have had fantastic experience with Phoenix. It is my first and only lightning wallet on my android, and it is just perfect! Of course it may miss a feature or two if you have specific requirements, so do check it out.
What makes it not recommended, I believe, is that it's custodial, so it doesn't allow users to access the private key or seed
For small amounts and recurring payments, I still believe it's a good wallet, but thinking about Bitcoin's best practices, that's why it's not so recommended
Correct if I'm wrong guys

That is correct I think. Don't use custodial wallets if there are equal or better wallets that are not custodial. There is no need to do this.