The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mkrgsKuFE

Height: 1566
Hash: 39833970ea9e9681b039accdc6f87a705f6a44f239ca0b4d8b7570d9a6ddd1b2
Previous block: 62adad5bc09ad1fe06809d6720ba7ebd961e34f105998860af19181bb2e01b5d
Next block: 6ce2cfac9fe6b61edf557bdd3f420dd2e7794c688636cdb5112a9f57eb94a95c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1708932130
Stripped size: 218
Size: 254
Nonce: 5
Merkle root: b0c472f3db50fe6cc5572acfc6e41f1fba3c9870c090d48ba30deb7b152a90f5
Median time: 1708932130
Difficulty: 4.656542373906925e-10
Confirmations: 43
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c3e
Bits: 207fffff