My wife hasn't gotten her refund yet. She's a teacher. Any idea what's going on?

As per The Canadian Teachers’ Federation: 

Unfortunately, teachers who claimed Line 46900 – Eligible educator school supply tax credit on their 2021 tax return will experience delays with their Notice of Assessment (and subsequent refunds). We understand this can be confusing. Below is a summary of different scenarios that may apply to you. The BCTF cannot provide tax advice and members are encouraged to contact the Canada Revenue Agency (CRA) at 1-800-959-8281 with any questions or concerns, particularly if you are experiencing financial hardship and would like to request your return gets processed without the credit at this time and is later reassessed when the bill achieves Royal Assent.