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: 1021
Hash: 30c1aaeba4a0b41089fcceff93936309059b5c73e5c083278936c6734cbeec0f
Previous block: 634a8c2df1d949168be336b9b3570753561188d0d8accb0b6f38a06e0b59ab9d
Next block: 48c3fd74f9e3f7228d290f15a87661d307877e24b2f74dea7b839f9bd64ad5c9
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857839
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 76a0d2119e914d98023bcb2de800b4be84cd9abebb3c9468e2150ab40f41eea1
Median time: 1707857838
Difficulty: 4.656542373906925e-10
Confirmations: 1223
Chainwork: 00000000000000000000000000000000000000000000000000000000000007fc
Bits: 207fffff