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: 456
Hash: 3c3d06a296bc25da84c50b0ee8ba9add1d3f9bc52355400e4e78a48aa217bfb5
Previous block: 6dbdd2084e2754076e1780ad7aae0639316d4d164f24ece80b6dde269039461a
Next block: 4ec784ed9dd1a8f5507000b987906437429dd927ea7f33a3c51d5b59137bd334
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864219
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: f15bd4e70e96f0b2c35f5a67a61e131dede134d32c66d1bcfa2f6eda7f947578
Median time: 1701864219
Difficulty: 4.656542373906925e-10
Confirmations: 1788
Chainwork: 0000000000000000000000000000000000000000000000000000000000000392
Bits: 207fffff