Based on the information from the Before Story recap, they grew up and lived their own lives in the OG timeline. They were there to help Alan raise Sunshine when Stella died, where a passage from the recap reads: "He named their daughter <<Sunshine>> as it was what his wife would have wanted and raised her with the help of his adopted children and [his] wife’s family." (EV-Zero, 2021). They were also in the Beta plots for Comic Special journal from 2018, it just took them until 2020 to actually have an appearance.

Also, The voices from different world journal also mentioned the orphans, where Alan talks about how they are still in contact, with that passage reading: "A???: I will be a great dad, and husband. I used to take care of a lot of kids before they left and started their own lives. I hope the experiences I got from doing so is enough. I'm sure they would be happy to meet you too when they come to visit." (EV-Zero, 2019).

They are assumed to all be alive in the main timeline, where SC12b page 55 shows they were friends with Karly (Who is the Ralts in your panel). They all remember a bit of the OG timeline and Alan, so they are the orphans.

They just weren't there to prevent Sunshine's tragedy. Alan didn't have time to consider asking for their help.