so I lost track of time and waited for far too long.
Good to see you are taking responsibility for not following up.
You have 30 days from the last estimated date for delivery to make an eBay Dispute.
You have 60 days from purchase to leave eBay feedback (which has no effect on the seller's account, by the way).
You have 180 days from payment to make a Paypal Dispute.
You may also have coverage by the credit card you attached to your Paypal account. Chargeback policies differ, although very few allow nearly a year's coverage. You could try.
the original listing ...said it was cancelled due to being lost/broken but I was never contacted and Paypal says the money was never refunded
Your PP Activity List goes back to 2018, was that where you found the original payment? If there was a refund it should be there, but if you back your PP account with a credit card, which is a Good Idea, the refund would go directly to the card.