Thank you for your prompt response, @starkerz. It is certainly interesting to see it appears you are able to pull up my posts inside the UI for the One BTC Club.
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While I did not mention it in my post, I had seen earlier than my account is listed under "Members," when I go to the website myself. I assumed, since the list has the exact same number as subscribers on the community webpage I see via PeakD, that this was simply showing that:
I will point out, though, that the BTC balance showing is incorrect
, even though it is showing the correct BTC address:

Source: View of my Ledger-backed Xverse
wallet address for the One BTC Club
This additional bit of info may, perhaps, be another clue as to what I am up against.
I will also point I was an early adopter of the Brave browser and have used it successfully for years. With a number of different Chrome extensions added to it. As can be seen above, setting up the Xverse wallet went just fine, as far as anything I experienced. And I have had no other problem with Hive keychain.
As you rightly say, we'll need to see what @breakaway-dev has to say, from here. Hopefully this post and these comments will help.