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: 545
Hash: 2aef41021097f4e3b6316c2b3f0a5a5c20ff9eb57a922dac165013978a240142
Previous block: 27d6695611c72a007788bb9763090756b4988748a08d114107a03a19d6b65ab3
Next block: 1fc7e922145873e522df3b511b0f82b0570b56cbdecdf2974c97ff0cfd2b3dab
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864234
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 223efb4e701e4fab7ae43965b7972b22e44c2ca2885b9b822c6e800dd2f283f0
Median time: 1701864233
Difficulty: 4.656542373906925e-10
Confirmations: 1699
Chainwork: 0000000000000000000000000000000000000000000000000000000000000444
Bits: 207fffff