According to The Athletic, the B1G will keep it's current configuration for one more year and then change to a "new model" in two years when it integrates UCLA and USC. No details yet on the likely unified conference setup. I think we all expected this, but it's nice to get confirmation for next season.
https://theathletic.com/3724796/2022/10/24/big-ten-2023-schedule-divisions/
https://theathletic.com/3724796/2022/10/24/big-ten-2023-schedule-divisions/