Clark forgot he loved Lois, that was established when the super-merge occurred in Superman Reborn. His feelings for Diana were entirely artificial.
Even then, Diana was steadily moving away from Clark around the time of Truth and was even telling Steve they were just friends again by the time we got to Darksied War. They only got back together in "Final Days" out of pity because Clark was dying, and once Clark died, Diana made her feelings about him quite clear to Steve...easy love without a grasp of true romance. Clark may have "loved" her, but she did not think of him in the same longing terms
Continuing the story as it was with "Truth" would be problematic...DC have a very firm Anti-S/WW agenda going on internally now.
So give us a Clark/Lana relationship instead...there were loads of Elseworlds where the Lois/Clark/Lana triangle was precedent and it'd be nice to give Lana a fair shake for the first time in decades. Going with Diana again can prove just as "stale" as we've seen that pairing a million times in Elseworlds. There's nothing truly "fresh" about who you stick Clark with anyway.