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: 972
Hash: 72d24cd831b6813c434627975493afa7a442d6703fa34ec34e75720ba251de48
Previous block: 16dd7f81cf24c5c03a6763b04895b3bb792d7c4697521ae53470321f23fa775b
Next block: 4472111292919eff2bc953d90fad4d2f0fd0e6b129e8bfac4ffdb30723c3d7c5
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857830
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 3fb779c9e2b70cacaeb9cdc3214272228d69e9157113f667874c798fbf93f6c6
Median time: 1707857830
Difficulty: 4.656542373906925e-10
Confirmations: 1272
Chainwork: 000000000000000000000000000000000000000000000000000000000000079a
Bits: 207fffff