You, the SENCo and class teacher should be getting together each year to amend and update.
Sometimes the LA come to the review.
It is then sent to the LA who send you a draft copy which you need to agree if right.
The EHCP is then updated and sent to you and the school.
Get in touch with the SENCo to arrange a review as a matter of urgency. @AzkabanWitch
It may have been missed due to the pandemic or they may have one heck of a backlog, although my DD'S was done via teams during lockdown so there was a way.