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: 354
Hash: 42d8ad9dc824387d9b25d398d49b7c1cb9ce0e5bef12a7c336a597c8a251a2c8
Previous block: 173aa2ce690af5a904cee08395cbe234d1551396b82de2beb491a9e370423ae0
Next block: 6ba1a7dab9855605d79d2dcc194b0c4f6810df4a580f47b5442407204e8a64fe
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597926
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 39ad9364d3013d658ec3c6a0930f9671843a4ec7107e9c14f5c5033de8955d57
Median time: 1701597925
Difficulty: 4.656542373906925e-10
Confirmations: 1890
Chainwork: 00000000000000000000000000000000000000000000000000000000000002c6
Bits: 207fffff