Is the ChatGPT associated with the school? There are ChatGPT edu accounts which have restrictions and delayed rollouts of updates.
https://help.openai.com/en/articles/9377311-chatgpt-edu-at-openai
Not all of the rollout updates are noted in the linked page, one would need to hunt and peek around the FAQ pages for such. 
https://help.openai.com/en/articles/10093903-chatgpt-search-for-enterprise-and-edu
https://help.openai.com/en/articles/10128477-chatgpt-enterprise-edu-release-notes#h_0945ee95f3
If this is a school account then you will need to find the account admin at the school to get further details as they may have disabled both.