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: 564
Hash: 56060e74e339b8fd10455ef4a04b39153facc9aec3336777cdcfb8b82a9c92b5
Previous block: 03f0b6979801d48d9ab150625df00188f8b12f93f05d257e412e76678304c2d4
Next block: 0d637e3ca5495e28cecc0cc3d2a20ced27a7588d2fb1b45158580de8ee38eb2c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864237
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: d8a95ad340c88adcb8b6785211ca1267118ac53b47a444a30cd645fc205a5d82
Median time: 1701864237
Difficulty: 4.656542373906925e-10
Confirmations: 1680
Chainwork: 000000000000000000000000000000000000000000000000000000000000046a
Bits: 207fffff