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: 44
Hash: 42bed65fe29198f115ca9b48e0928334781893cbcfc0168851a9bd3836056e7d
Previous block: 5da7af0a7bb25bb40b8f0048ad2aa07191a5d7a7f6a228d3e12ca687f1c08a9e
Next block: 715ac2f1404db58c17b38be4429e17ccb6d91b1adbee47f3942aed873b963e22
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597875
Stripped size: 217
Size: 217
Nonce: 1
Merkle root: 65ba3162df116b7f9c456bd4e32e20538d5773a82207ece1facd5a65d5f87db8
Median time: 1701597874
Difficulty: 4.656542373906925e-10
Confirmations: 2200
Chainwork: 000000000000000000000000000000000000000000000000000000000000005a
Bits: 207fffff