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: 355
Hash: 6ba1a7dab9855605d79d2dcc194b0c4f6810df4a580f47b5442407204e8a64fe
Previous block: 42d8ad9dc824387d9b25d398d49b7c1cb9ce0e5bef12a7c336a597c8a251a2c8
Next block: 7b804ffe5a3695757aab8109a9e841b770291a97e84459df8cfeda06eb3a2d10
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597926
Stripped size: 218
Size: 218
Nonce: 3
Merkle root: a9525f645da028467f6e52d98bd705297a8969d7fadae28778ae0ef2050d9a2a
Median time: 1701597926
Difficulty: 4.656542373906925e-10
Confirmations: 1889
Chainwork: 00000000000000000000000000000000000000000000000000000000000002c8
Bits: 207fffff