What are the Common App essay prompts for 2020-2021?

Yes, you can view the common app essay prompts along with your colleges' supplement essay prompts on the common application website.

Here you go! You can see them here https://appsupport.commonapp.org/applicantsupport/s/article/What-are-the-2020-2021-Common-Application-essay-prompts or here https://blog.collegevine.com/2020-2021-common-application-essay-prompts-are-here/

I'm not 100% sure but I think they are updated August on the common app for each individual college. Some might not change their supplements though and there are common supplements like the "Why this college?" questions. Maybe a google search for this year's can let you know what to expect. Good luck fellow junior!