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: 540
Hash: 21a44ebf514b9037f3e1e381b6d53fe90cd47ff4ac5336975d56d3dcaf47a3b3
Previous block: 4f3004697a341e35794b1fef9a215dbd0ff674f5adf4c094204edebc4ec2130c
Next block: 3319162734927b3a67a3edf65efccd4e57c95f03dd19756d4a691b02c7b26e69
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864233
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: b76cdbc2fd937f523f4889418d4d06423752e46641e6b50abd8301c536d3cf9e
Median time: 1701864233
Difficulty: 4.656542373906925e-10
Confirmations: 1704
Chainwork: 000000000000000000000000000000000000000000000000000000000000043a
Bits: 207fffff