it doesn't support manual channel management/creation but rather it automatically creates channels exclusively with ACINQ's node.
I understand. For me Phoenix was necessary because I can't have my own channel open for long enough.
However, I've seen in phoenix options to disable automatic channel management by them or to import encrypted channels. But I don't know what they are and how to use.
Maybe you'll ask in the other topic which is for general LN install and usage questions.
Does it mean if I need to receive a huge amount of money through LN I will need to have inbound liquidity that is enough to accommodate the funds?
Afaik yes, especially if you manage your LN node. I think that for me Phoenix will handle if the fee is under my setting.