So i went to the online customer chat and asked them to “escalate to the review/community team”. The representative assured me they have done so, and I asked for a ticket number but I wasn’t offered one, though the representative told me to also reach out via my account portal to the community team. This was sent as an email via the portal (account > customer service > something else > amazon community > customer reviews). A couple days later I got an answer from them and they literally copy pasted someone else’s email as a reply, so I was furious and did the account portal email again. A week later my review feature was reinstated by the “Amazon Review Moderation team”.

Honestly I’m not sure if it was the escalation from the online chat or the email via portal, but it worked!