Because it’s as exactly as RileyJames said above. It was ultimately my own doing but was masked by the strange relationship eNom has/had with Google. It felt like extortion, but wasn’t in reality, just business practices that don’t put the customer first.
https://help.enom.com/hc/en-us/articles/115003360647-Renew-E...
https://www.enom.com/kb/kb/kb_1487-last-chance-renew.htm
There is a whole process via which domains expire, they do not simply become available to register upon their 'expiry' date.
Full process is outlined here: https://tee-solutions.com/index.php/our-blog/127-domain-name...