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: 442
Hash: 5aaa3e9c77f14c5b27b4b2cd7b0e399d509bbc463e84d685cd8b8227bacc39ce
Previous block: 59ef54aeeeeeffbfae8a43b7fba49b9a0ca6fb32724f0dce3048ab79bd017f68
Next block: 245161cc2654de8a98ca83064790f8968db77f01f17e7d0e57f919a5de57920f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864217
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 6c217c1fd887494c4faed0fad06321abc30910bc20ae907a8fc9d60d04fbd83c
Median time: 1701864216
Difficulty: 4.656542373906925e-10
Confirmations: 1802
Chainwork: 0000000000000000000000000000000000000000000000000000000000000376
Bits: 207fffff