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: 570
Hash: 608512d3a95c01e6dfdbbfb282d4b220dfc1a9fff18ab61d5754a36de1d4b639
Previous block: 4b753b434bbc2ad46bf12aa27613201f1e7fb5bce67faddd4054da9b1279ec12
Next block: 1f354d82df8303fd7de60ebc66713af9d07e31a234db94799119cd40e39963b7
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864238
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 7a7f9e96b690be5c467175bb12f726f657a14df7c941fb613342ac749b5bf7e7
Median time: 1701864238
Difficulty: 4.656542373906925e-10
Confirmations: 1674
Chainwork: 0000000000000000000000000000000000000000000000000000000000000476
Bits: 207fffff