Lauren Elizabeth, Biden was never enthusiastic about student loan debt. When pushed by the left of the party, he said he was willing to try for $10,000 of relief. In the scheme of things this got left out because of priorities.
Cancelling student loan debt? the issue and solutions are much more comprehensive than that. The cost of education needs addressing. A short term, so thought fix of loan debt, would only channel more money to institutions and a message to carry on as normal.
An alternative idea is to place money directly into would be student's pockets to spend on education. Some relief package to include previous students could be part of this.