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: 1818
Hash: 51662eeedbf0856ddd1d313530c449c10574d4948a2f814061fde81819d4ca85
Previous block: 0d61ebd92d2df0a0b6924704de536e0c22466cccbc8d3ab1d705afc99745bcf1
Next block: 742b8a93aff9f808f93f5acee30b9658631e1236145cd29f9339a162df445425
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159226
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: e5afaf1c99d83e1b7fedfd0b7da476b1e7d461d98d27cf05b0b28ccb7cf2ce8d
Median time: 1719159225
Difficulty: 4.656542373906925e-10
Confirmations: 426
Chainwork: 0000000000000000000000000000000000000000000000000000000000000e36
Bits: 207fffff