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: 294
Hash: 3a8b490ef9dcb381a1b2d4fd67bad3e020a3ec694cc26519cd0c33bd0caf3f17
Previous block: 15f6642f0ad35ac00c8e49712a23b472254e2cd9968435e1d12fcd1711da8b07
Next block: 56ed494fb157e2f26e88b122ba68c1defe4beb90732a0f552a0c2b93af3e6c65
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597916
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 43c995d198ef489293208cad315e0340029b0b3b870e3353b07f8f30ede803c9
Median time: 1701597915
Difficulty: 4.656542373906925e-10
Confirmations: 1950
Chainwork: 000000000000000000000000000000000000000000000000000000000000024e
Bits: 207fffff