I mean, they could easily have Damian as the main Robin and Tim as the Robin on the Teen Titans, and that’d work fine imo
Also, I feel like it’s not all that difficult to fit four (or even all five, but I’m not holding out hope for Steph’s tenure as Robin being acknowledged) Robins into Batman’s timeline, depending on how long he’s been around. Like if we say Batman’s been active for something like fifteen years…
Year 1: Bruce becomes Batman at the age of 24.
Year 3-7: Dick operates as Robin from ages 14-18, founding the Teen Titans during this time, and ultimately leaving to become Nightwing.
Year 8-9: Jason’s tenure as Robin, ending with his murder at the hands of the Joker.
Year 10-14: Tim’s tenure as Robin.
Year 15: Damian makes his debut while Bruce is 39.
And you could condense the timeline down even more just by shortening how long each one served. No need to cut any of the Robins or Batgirls for that matter