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: 621
Hash: 2fd22d45a8add152bab8d82004f5fa59c9c4640b1954f0e0830795a5ba799b90
Previous block: 4b31b15d711b69c763cb785721742ad4ac257286eae5284f05503bfa78dc5f95
Next block: 2bdc7c33ffc8f05d4427a09877ac9f650b93ec535a700b99a082869ae2568820
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864247
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: fba472863cd53d2b4d0d0e0e1064f614b0db1f745f1afc8d07cef1822e115630
Median time: 1701864246
Difficulty: 4.656542373906925e-10
Confirmations: 1623
Chainwork: 00000000000000000000000000000000000000000000000000000000000004dc
Bits: 207fffff