I scanned the initially concealed QR code on my phone, entered the also concealed code and was presented with a web page with info pertaining to a btc balance of 0.6104...ish. Is this typical of how these things work?
It seems that you scanned and opened the address that hold the bitcoins on a blockchain explorer. It can be any of them.
Here is an example of what info about a random BTC address you can find on Mempool.space for example. As you can see, there are 3 fields at the top: total received, total sent, and the final balance. Did you see similar data on your end as well? Does the address still contain the coins or did it only have a history of received bitcoin but a 0 final balance?
I wasn't required to enter any other info. Seems a bit too easy to me....
Nothing else is needed to look up the balance of an address. It's a bit different when you want to spend the coins. For that you need a private key and seed.