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: 1904
Hash: 7a606200ba5f0998bfef955d3d61d83bd266855374c7687574526a5c9bb454b9
Previous block: 27b7d4052ad7dbfa126e697b28023eb7a5da62496d64951349588a2afbec7523
Next block: 786fc974a9b503b2240707fee7e10503e7150b33d15ce06ea4d590f69494b5fa
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159241
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 60b84370265a2c73454943d53871591bdbbd0dad8e367e1b302a8d1a74c296b1
Median time: 1719159240
Difficulty: 4.656542373906925e-10
Confirmations: 340
Chainwork: 0000000000000000000000000000000000000000000000000000000000000ee2
Bits: 207fffff