She left Salem with Sami, Johnny and Allie in 2014, so she's been off-screen for almost 9 years. When Allie and Johnny came back to Salem in 2020 and 2021, it was said that Sydney was in boarding school. She was born in 2009, so in real life she'd be 14 years old (15 if you're still fooling around with the time jump that Days seems to have given up on). Due to Johnny and Allie being SORASed, if Sydney was SORASed accordingly, she'd probably be in college now.
As it stands now, there are no other characters on-screen in her age group, so bringing her back to Salem now would be pointless.
Yes, I can understand that. It would just be nice for continuity of family if they would at least bring her back for weddings, funerals and/holidays at the least until she is "aged" enough to be brought back into stories. I find it hard to believe she would never come back to see family, even at boarding school, or for her grandmother's "funeral".
It would be nice to see her come back and give her dad EJ some hell, a little bit. It's doubtful that she'd turn out well with Sami, and EJ for parents, but it would still be nice for her to come back and put the whole lot of them to shame, in an upstanding way, or if they want to go all DiMera with her, have her come back, and with Belle's help, take the whole company away from all of the crazy bunch.
Leave EJ out in the cold for how he treated her mother, and then Sami comes back and they run the company together as a mother/daughter team. The men in the family, have screwed the company up for quite long enough. Let the ladies have a shot of it. For a show geared towards women, there's not many empowered women that aren't dependent on the men, in some way. Let's see what the ladies can do with a little bit of actual power, and prominence.
Johnny is on screen, and so is Chanel. That group includes Tripp and Wendy. Sydney could be in that group or the older one that includes Alex, Stephanie, Chad, etc. They can make her whatever age they want. And she’s always had a special relationship with Nicole. That could be mined for story. She’d be in the DiMera mansion, and Gwen needs a real friend.
That's what I was kind of thinking TinaY. She could fit into that group easily, as long as she didn't get involved with Chanel, like Johnny/Allie did. Lol. Maybe she could be the "one" for Alex, and perhaps help him with his glasses affliction, and help him get over his obsession with Stephanie.