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: 574
Hash: 64586f8265a86563db83cf293f17e8dd64cda05a8f987a80fb2464b527345662
Previous block: 71ed8bbf9ae2ae5b86b1b8af725273cd40ce159e192b08ac7ccad9bb88766571
Next block: 37c48677ce67ba05f440db1265181f1eb27495e7fda18a1f3dfcc2b32e593027
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864239
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: ba502b86952a38777e741eacee66f7a929fbc635475adb77c80cb51d0f27b75a
Median time: 1701864238
Difficulty: 4.656542373906925e-10
Confirmations: 1670
Chainwork: 000000000000000000000000000000000000000000000000000000000000047e
Bits: 207fffff