Being outside of time implies a “forever-ness”
No, no, no. Not in this use of eternal. Eternal in this use does not mean never-ending. It means outside time - no beginning, middle, end comes into play. Nothing dealing with time applies. Outside time. Transcending time might be an easier term to grasp.
Like I mentioned, without time, you can’t have change. If there is no change, that’s forever.