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: 550
Hash: 2f16c6faae4a8fa33cfd996f8eeddb44ecd94e4bfe6e566b92914a0e816e92c0
Previous block: 349c98fd310a8bf2c617274deb336eb9dbc82e5aa0c9aabea210814b7202fa07
Next block: 56b9e0cacb2753199dfaedd8c64db6dfabc5b363386291da40508db15963d056
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864235
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 23c5cc1bde7c134e60aadcd6ab8ab778103c53a3b7d0133b9824763ddbdd802b
Median time: 1701864234
Difficulty: 4.656542373906925e-10
Confirmations: 1694
Chainwork: 000000000000000000000000000000000000000000000000000000000000044e
Bits: 207fffff