It’s a custodial wallet. They own the private keys to the wallets you are using. Meaning they have the ability to spend those funds.

You would need to use a non-custodial wallet that keeps your private keys on device. There are several good ones, but none of them support Lightning addresses for receiving “zaps”. I recommend Phoenix wallet to those unfamiliar with non-custodial Lightning wallets.

If you want to receive zaps non-custodially, you’ll need to run your own LN node and setup LNURL (not very straightforward at the moment, but I did write up a guide for how to set this up on a Raspiblitz if you already have an LND node running on it):