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: 1397
Hash: 57cdbd66d250f933765967e702b0558e0b1b86efaa921f9c9081276818a536fd
Previous block: 764c31664af28ed525f42643211941c7a666e5079b13ed4fc5ef60d1133f88ee
Next block: 22b52e00cdee39ede2552b138efde549700460cf9782824bcb6ac6be86fbc5ae
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1718697640
Stripped size: 218
Size: 254
Nonce: 4
Merkle root: 1b2d879705b19023f01200c1d7a81a0a073a64aa17d425b277200b11e95981b9
Median time: 1718697639
Difficulty: 4.656542373906925e-10
Confirmations: 847
Chainwork: 0000000000000000000000000000000000000000000000000000000000000aec
Bits: 207fffff