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. mxMfLjAez

Height: 506
Hash: 65528b3d6b71177d477f2fc7518402fb61f27566c4834d89d18d5f03f67494ae
Previous block: 562e1b9323467a45620032237182c280c11f48ff344bc9d9625ae3d14a215aa9
Next block: 4219aabb71d3f9c1e93d449f355a01585aafb71016055c5a27267ea76bbf3bcf
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864228
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 7df8aaa6ea3adf1ae3cb3f1b9d2832173fb02a8a26622e9b8755ee8b75d720ce
Median time: 1701864227
Difficulty: 4.656542373906925e-10
Confirmations: 1738
Chainwork: 00000000000000000000000000000000000000000000000000000000000003f6
Bits: 207fffff