On Nov 7/22, at GC4RTQ8 in Niagara Falls, Ontario I picked up the explanatory note that has previously journeyed with the coin — alas, no coin. A double check of the cache the next day didn’t help. I reached out to Bound2 mentioned in the note, who put me in touch with Hollara the coin custodian. Discovery and posting with Hollara’s consent, but it’s looking like the end of the line for the coin…
I appreciated the good humour and guidance of my fellow geocachers mentioned above in navigating this situation!