Oh yes, the Ezekiel prophecy. That ones a head banger in trying to figure out. Whether it’s literal, futurist or even allegorical. Backing up and taking Ezekiel as a whole, it appears that this one was conditional on the peoples spiritual condition and obedience. God left this one unfulfilled because of the failure of man. Once again.
I find the literal to be necessary - How does one assume that the War of Magog is yet to happen without requiring also that which follows it? Every word that YHWH has ever said will surely come to pass. HE declares that, not me. His words do not return to Him empty. Unless, of course, you claim that the Magog war has already happened somehow (Zeke 38)...
The reason it is a 'head-banger' is because of normalcy bias. It is outside of the paradigm that we all have been raised within - Rome still has tentacles deep in Protestantism - Hence the OP.