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: 100
Hash: 4203297939cc364749459ce5b5f3ddf49feb54ef98a321f52662f2fff4c0082c
Previous block: 0ff712e78b7e0c583883735352f9950c50bf063c261b22e01700b3ce4caeacb2
Next block: 354cbe427f8189fd951480b58b9f1f19d59a6c25a60cee5cb273f64d699360cd
Weight: 868
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701597884
Stripped size: 217
Size: 217
Nonce: 1
Merkle root: 23309d7a13d430670f17de3e968f8377c1340a1c14c9ccb1a8ab0d1c7fd309d8
Median time: 1701597883
Difficulty: 4.656542373906925e-10
Confirmations: 2144
Chainwork: 00000000000000000000000000000000000000000000000000000000000000ca
Bits: 207fffff