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: 349
Hash: 5401ab0ebe089dc7fcc545ebde0fe149065dfddd218c612a13c0a4f886be1ce8
Previous block: 260b4ef39358b37826cc0020120faaf085fcb0ca090dc3d49dcd2c0b57a03f13
Next block: 1bb2337b4eb772d8630b3893ffd9a27cc0e324fb5a1280522928c36af5626fbe
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597925
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: b3b1dc6c51e6d5c9df0082d785aeae1fa31882fdf3ab87403a59b4c6d4de5c5a
Median time: 1701597925
Difficulty: 4.656542373906925e-10
Confirmations: 1895
Chainwork: 00000000000000000000000000000000000000000000000000000000000002bc
Bits: 207fffff