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: 647
Hash: 24984844a6accd7e222df801cc78159c815828bd1015ec75d86cd1df6a1a5651
Previous block: 45266965248c0bfcbe988f83b7e32f5da34dd39e4bd17d0c7b5fbd5ca7d19eab
Next block: 3ff423bd622ffa98b4be5f4e3741ea0c1f0badaaf9016df7f49938ef97e9be1a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864251
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: da634f184488f4fcb8298bfa43c08b90bbe926d58c6f2b1e74ce5ab6e1da7ceb
Median time: 1701864250
Difficulty: 4.656542373906925e-10
Confirmations: 1597
Chainwork: 0000000000000000000000000000000000000000000000000000000000000510
Bits: 207fffff