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: 654
Hash: 460076e398401c37d1ba34e21fd64e39b5ad5ec3e03a17164d16ac76eb903bb6
Previous block: 43f7627a92732978ba28bb9dfe08531518a37115a54011269ae407684dc3861e
Next block: 18aa482b399bc71f01745559272db7caa1d19683b2dfc55d9aa85e4405809253
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864252
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: e2932a6ae67f1d40a61541150904166b54359186856a3e96eb834b6973d02cf3
Median time: 1701864252
Difficulty: 4.656542373906925e-10
Confirmations: 1590
Chainwork: 000000000000000000000000000000000000000000000000000000000000051e
Bits: 207fffff