No, you can’t convert BIP39 to aezeed. You’re best off sweeping the funds to a new Zeus wallet.

At least fees onchain are low right now.

Note that you can only use offers with a remote Core Lightning node though. 

 Ok. So I can recover that wallet as best I can and try. It has to be Core lightning and not LND? 

That may work out.  

 Yeah you have to set up your own Core Lightning node and remotely connect it to Zeus.

The node in the phone is LND.