and this is why we need a simple, easy to follow, guide on getting started with Nostr and things like NIP-05 verification. I looked when I started and it was not at all intuitive.

BitBees - yes, if you set up a new wallet, you simply add the new lightning address in the field on your profile and save it. That will then replicate across all the clients that pull your Nostr profile. One update, shown everywhere.

The challenge is what wallet to use and picking one that you v=can use on a mobile device, in a browser, and whichever client you prefer (Primal, Damus, Iris, Rabbit, etc., etc.) Some work with certain wallets but not all. There's NWC (Nostr wallet connect) but not all support it. The only way I know of to do this and have thorough control (without a paid subscription service that costs more than your zaps each month) is to install a Lightning node on your own server and manage it. But that is a LOT of work for most people and a total barrier to adoption for many!