The BCCI has made playing domestic cricket mandatory for its contracted cricketers unless there is a fitness issue following the series loss in Australia earlier this month.
source https://sports.ndtv.com/ranji-trophy/virat-kohli-to-make-ranji-trophy-return-after-13-years-set-to-play-this-match-7519326#rss-sports-cricket
source https://sports.ndtv.com/ranji-trophy/virat-kohli-to-make-ranji-trophy-return-after-13-years-set-to-play-this-match-7519326#rss-sports-cricket