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: 549
Hash: 349c98fd310a8bf2c617274deb336eb9dbc82e5aa0c9aabea210814b7202fa07
Previous block: 681c177a600ca1ec154126220f0da1326ecc6aa0102a0c927e62c5f1f5937dc8
Next block: 2f16c6faae4a8fa33cfd996f8eeddb44ecd94e4bfe6e566b92914a0e816e92c0
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864235
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 1bc5ced2c13ab692bba0488487fcf885555a72ef221600365b34abc3361407cf
Median time: 1701864234
Difficulty: 4.656542373906925e-10
Confirmations: 1695
Chainwork: 000000000000000000000000000000000000000000000000000000000000044c
Bits: 207fffff