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: 1921
Hash: 0aae46f309e1573fec51f81b96cd2d4edcf934bae2aa4a5ed703e39ac6e972aa
Previous block: 5bb1eb2aa2d304b3b64510cced4b9c763abd30853ef8b9ce24bdf257dbd61920
Next block: 6ec9140af6b9403f80d53726c0f3f5ef0a416fdf93573867e057145bf295faaa
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159243
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 0f11b156edcc1f0fce1cada1d866db71d1bf0f65b1c36f9594ce28905742d272
Median time: 1719159243
Difficulty: 4.656542373906925e-10
Confirmations: 323
Chainwork: 0000000000000000000000000000000000000000000000000000000000000f04
Bits: 207fffff