No. This assumes that the number of voters will be static- but people die, they turn 18, and then they also decide to register and vote for the first time at 30.
Maybe for the 2026 line you meant 2016? Because it's looking like the Dems picked up a total of 53 (52 if you don't count Alaska yet). In 2016 the Dems picked up 41 seats in that midterm.