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: 620
Hash: 4b31b15d711b69c763cb785721742ad4ac257286eae5284f05503bfa78dc5f95
Previous block: 3c930c98ea0acf3bc2ddf6b659d24328625e66a1c5e169583fdd84077bfdf0b4
Next block: 2fd22d45a8add152bab8d82004f5fa59c9c4640b1954f0e0830795a5ba799b90
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864247
Stripped size: 218
Size: 254
Nonce: 9
Merkle root: fc1a0ef6e2cc732da8f8a386cddf0b9fa989515cacf312d689c451304b6796ca
Median time: 1701864246
Difficulty: 4.656542373906925e-10
Confirmations: 1624
Chainwork: 00000000000000000000000000000000000000000000000000000000000004da
Bits: 207fffff