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: 838
Hash: 684829a63f99d8f6aed464f8b96f05fe7ae1a81907bceebe9a41a637236bdb4d
Previous block: 74406b6df61782565d65bca1cdc2169ae75806568633ca828f88812ef1c117ba
Next block: 7479b33dcd65477103ecfab3428549e655370766b8c053e88d9629b889bdcc11
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857808
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: b0405d6ac8089725d83628cc2e331e230befc41f47ed5c92133c177d1ee42a79
Median time: 1707857807
Difficulty: 4.656542373906925e-10
Confirmations: 1406
Chainwork: 000000000000000000000000000000000000000000000000000000000000068e
Bits: 207fffff