Yep exactly this. Tim wasn't a part of the Bat Family things happening despite Nightwing, Jason and Damian getting shine. Whilst Tim was on the Teen Titans instead. Which was a point of frustration for Tim Drake fans back then. One of the many reasons why they blame the New52 for Tim's rut he's yet to recover from.
The New 52 was the time period where all the other Robin's got their own prominent titles whilst Tim was stuck with the Titans and away from Bat Family situations. Nightwing and Red Hood got their solo series, Damian was with Batman. Tim Drake no longer had a solo series and was with the Titans. During the CoO event, you had every Robin in their respective comics getting a special issue dedicated to the event
especially Dick. The only Robin who didn't get any special attention or a book dedicated to him and his part in it or how it effected him? You guessed it. Tim Drake
And as I mentioned, Tim had his entire character changed which I think has been retconned but I need that confirmed. But the Tim Drake that figured out who Batman and Robin were because of 'how they moved' which was a story point sloppily attempted to be given to officer Robin Blake(see what they did there) in the Nolan movies... nope, that's gone. Tim showing up to Bruce's doorstep to reveal his identity and how he'd figured everything out and therefore had decided to become Bruce's Robin after Bruce's downward spiral after the death of Jason Todd? The kid that said "If Dick won't be Robin.
Someone else has to." Yep that's gone. And his status as Red Robin became instead of something he gave himself once the title of Robin was given to Damian, a title he had to give himself because Bruce was asked to take care of him by his parents, because oh yeah.. Bruce already knew everything about Tim Drake and had been watching him. Because he's Batman....
Again, there's a reason a lot of people hate The New 52 and all it did to Tim Drake. A lot of it in hindsight, because at the time they were willing to give it a chance and see where it went. And Tim has been struggling along ever since.