Help with USA leagues expansion

Hello,

I am stuck in my trial and error on the USA leagues, to expand the MLS, USL Championship and League one as well as the NISA with new teams coming in over a decade from 2021 to 2034.

However, when adding in the new rules for that year to accommodate the new teams, I run into the problem with the fixtures. I can seem to find where to change the fixtures limit, to raise it higher.

If someone can help that would be wonderful

Thank you.