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: 290
Hash: 7a9a9b0db31fc791105120b2ed886c03da0ca351c341c7568cd7cb290f5094bf
Previous block: 41b9434ca7b1830f80a1081a9976674a178b968293d66b926c6a9499ce6c98b2
Next block: 624f2f3eb747ee4a4f06ea913e7b0aaf497f352b03f17d32a2f6c41dda4d2b60
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597916
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 1b8dac30a81d9242b8c3c1c2e8850a01ab2f2ac37ab9b368b40fbe60b0cf119e
Median time: 1701597915
Difficulty: 4.656542373906925e-10
Confirmations: 1954
Chainwork: 0000000000000000000000000000000000000000000000000000000000000246
Bits: 207fffff