Alex and Arthur: "love at first sight", probably dating, kisses, deep emotional talk, cross-dimensional love, Arthur did whatever he could to see Alex, etc etc

Alex and Arthur: never confirmed to be canon

Conner and Bree: mutual crush, no kiss (cheek kisses don't count), not officially even dating as of the end of TLOS 6, mostly platonic conversations, etc etc

Conner and Bree: is very much canon, married, has three kids and more grandkids, "middle school sweethearts", married for 52 years (FIFTY TWO)

Uh huh, seems legit.

Like, I'm neutral towards the Alex and Arthur ship (don't really ship, but is fine with it existing), and I thought that ship would have a greater chance of being canon than Conner and Bree, and that is coming from someone who hardcore ships Conner and Bree.