It is a revived proposal, so it needs to follow the proposal process from the start.
There are the following procedural problems:
No RFC announcement on the forum
No voting announcement on the forum
Immediately to Voting, no RFC announcement was made
Discussions on talk page are not yet resolved
I have voted no on the proposal for these procedural reasons.
Should I also update the status of the proposal to RFC since that is the stage this proposal is currently at?
Not sure if it should be done another round, but the RFC was made in 2019. It had some discussion, but the author, at the time, didn’t put to vote. He changed some stuff in the proposal and put to vote now.
Reviving old proposals
There are many old proposals that never reached vote stage and where the original authors have abandoned them. What can be done by a new unrelated person interested in making identical or a similar proposal?
restart the old proposal - it is a good idea if you completely agree with it. Consider contacting the original author whenever it is OK for you to resurrect it - and wait some time for reply. Send it again to request for comment (RFC) stage and continue to proceed like with any other proposal.
make a new proposal reusing content from the old one. Simply create a new page, feel free to copy existing content (you are allowed to do this, just mention source of text in the changeset comment). Mention inspiration/source of the proposal, but feel free to make any changes to it that you want. And proceed like with any new proposal. You can also do this with your own proposals.
In the instructions for making a proposal:
You have to announce your proposal as RFC on the Tagging mailing list and the Community forum (sending on behalf of you is allowed, see below). [emphasis mine]
Similarly
You have to announce the vote on the Tagging mailing list and the Community forum (sending on behalf of you is allowed, see below). [emphasis mine]
Also, you can even argue that the vote has not been announced on the mailing list as the header should be of the form [Voting] ...