I assume you've tried using these contact options for the DVLA, but continue to try getting through to them: live.email-dvla.service.gov.uk/w2c/en_gb/forms/Cri...6

They should speak to you as you're a critical worker, but we're getting a lot of similar reports from people unable tor renew licences, get V5Cs etc. Unfortunately, they declined to give us a comment when we spoke to them about these delays so it's a case of continuing to put pressure on them to get your paperwork.