Yeah. That's my understanding. I think @BitcoinMechanic explained it on a video recently.  I think he said he had discussed it with Phoenix and that they may make some changes to make it compatible. 

siggy47

I think you can’t use Phoenix(d) because they don’t allow you to change the BOLT12 description which is required for OCEAN payouts … or something like that.

lightning

OCEAN made over 17,000 Lightning payments, almost all to CLN nodes via bolt12

k00b

I think you can’t use Phoenix(d) because they don’t allow you to change the BOLT12 description which is required for OCEAN payouts … or something like that.

@siggy47 probably knows more.