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.

home    blocks

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

Height: 673
Hash: 56d3ef977b6d2bc5ef77ed34f3262d6557e2a9bf303d228b04bba3e43841e175
Previous block: 553f90f2cc84443a77684c331fd9cbbc50b9534d2a31120a8a6c17d2427ce760
Next block: 1399ce3b714ff5d63cc936d592c2a67ab19085a00d972145979a62ff7155f65e
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864256
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 27768410e4dad40119d2ba4b4f8eac941da4e561196d4aca9e295abacc6fe9d7
Median time: 1701864255
Difficulty: 4.656542373906925e-10
Confirmations: 1571
Chainwork: 0000000000000000000000000000000000000000000000000000000000000544
Bits: 207fffff