Yes, by averaging several sites. We went through this before. Cook has 36 D at risk 10 R’s, Rothenberg 26 D’s 12 R’s, ID, 16 D, 28 R, Split Ticket 23 D, 5 R, Sabato 23 D, 8 R. Average 25 D, 12 R. That’s 13 more D’s than R’s. But 4 states aren’t included, Missouri, Kansas, New York, New Hampshire since they haven’t completed their redistricting. 538 list 33 competitive districts, but doesn’t break them down via R and or D. This let’s me know even if the Republicans win all their at risk districts and win all of the Democratic districts, they can gain only around 25 seats since that is the average of the number of seats the Democrats have at risk today. Looking at the at risk districts, my own thoughts on them, I come to the conclusion the Republicans probably will split 9-3 while the democrats under the current conditions split 10-15. That’s a 12 seat gain for the GOP, but with Biden low approval I made it 12-15.
I know, you don’t like my averaging. I look only at competitive seats, tossup’s lean and tilt. Not safe or likely seats. If you don't like them, ignore them. They're only how I see things using a varity of different numbers provided by different pundits. I'm like RCP, I like averaging.