well scratch that, the mods that i was hoping to be championships are only cars and tracks for those particular series(bpr, super gt, super touring evolution)....they got no championship folder inside them.....what a waste of time.... T_TIf the Championship files are not prepared in the mod itself .... no choice you have to do it by yourself.
There's a tool to create them easily.
This tool can be found here at RD: https://www.racedepartment.com/threads/gtr2-championship-manager-v1_62-by-jjmaneschijn.158916/
There's a possibility to create them manually ... but less easy of course.