No matter what the haters say it is literally canon that -
Caitvi are together, the main couple of Arcane, had many scenes, hints, and buildup in both seasons, the series ENDS with Caitvi + airship.
Timebomb are together in an AU universe, Ekko loves/cares deeply for Jinx despite all the shit and harm she had done to Zaun, to Ekko and to the firelights, Ekko gives Jinx a second chance. Ekko saves Jinx from suicide. Ekko and Jinx team up. Ekko misses Jinx/Powder during the ending. The artbook is filled with Timebomb hints and hints that Jinx also has feelings for Ekko. Ekko loves Jinx, we don’t canonically know if Jinx loves him. They have an enemies to lovers music video and song from an extremely famous artist.
JayVik may not be canonically a couple , but they care deeply for each other and love each other which is shown in both seasons. There is a butterfly pattern and butterflies connecting them in many scenes in the story. Viktor saves Jayce from suicide even when they are strangers, Jayce saves Viktor from suicide. Jayce forgets everyone and everything exists when he sees Viktor in danger or injured. Despite Viktor becoming a bad person, a villain and trying to harm Jayce, Jayce choses to overlook that and still wants his partner back. Jayce decides to stay with Viktor so they die together. An older Viktor can fully grasp life is pointless without Jayce. They die holding each other.
No amount of screeching from haters can take away these things from fans. The My favorite enemy music video is online and never disappearing, so is the artbook, so is the show Arcane, even if they somehow retcon everything in the future, the old stuff exists.