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: 129
Hash: 24a1f5503263d0eb157706a77f0fdadb8fe8d2be8fa37d6dbbf72ead20515b83
Previous block: 6adc9eed13776dd3b7e511a81a5e6d7bfe75be8462b8b1ad63d156bb0c1f3f6c
Next block: 4f216c4cc34133110b6ca66a911300c0e89f1b74e8c3a233fa7e0dc4466a58bf
Weight: 872
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597889
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 3754fa20e48088a4f6c94173f571dd023175f0ac1e5017ebbfbb62212b896fb7
Median time: 1701597888
Difficulty: 4.656542373906925e-10
Confirmations: 2115
Chainwork: 0000000000000000000000000000000000000000000000000000000000000104
Bits: 207fffff