First, pray for opportunities to meet students that are influential leaders in different groups. Second, think creatively about what approach to take in penetrating new groups. Make a plan and take action. If it does not work at first, try something new. Many campuses are closed, yet ministries flourish.
Students reaching students is the key to see a movement happen.
Give them vision and training for reaching their own campus. Again, prayer is the first step. Ask the Lord to open other doors for meeting students. Inquire from other Christian adults as to who the Christian teachers are in the school. Meet them, share your vision, ask them to introduce you to Christian students and possibly schedule team meetings, classroom talks, etc.