I’m not entirely sure when did they started dating but I remember I started following Jordan on Instagram back in October 2020 during elections and I got to know him through Sophia Bush (an activist and Jordan’s friend) as I was already following her and she shared Jordan’s post on her story and I found his post impressive which got him a follow from me. When Colton came out in April 2021 I liked his coming out post and started following him and I noticed that Jordan also liked his post and started following him. But at that time Colton didn’t followed him back. But in July of 2021 I saw Colton followed Jordan’s account which shows that they definitely didn’t knew each other personally, before Colton coming out. They most likely got to know each other through mutual friends or maybe Jordan made the first move in DMs and Colton replying him back. I can’t say my assumption is accurate but whatever I’ve said seems convincing.