I don't know why you insist about the license. The main question is what's is going to happen when you terminate the product.
I bought this license because this I was told
"it's a license that covers every ESET Mail Security product, both MS and Linux" :
/etc/opt/eset/esets/license/esets_3857ce.lic: ESET Mail Security, 2022-05-22 02:59:59, MyIP net-Works O.E.
If that's not true, someone at ESET Hellas messed up. Not my fault.
Anyway, from what I understand I got ~9 months to find another replacement for Esets.