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: 538
Hash: 3b2797cdb429ba017a58a58360815ad5742b82b90591456aaeec0a3b456c121b
Previous block: 0c01f0411dd1f0d7e6c2ec766bf2bf921924ffc9ae2b8b7b53973f3abde85b4b
Next block: 4f3004697a341e35794b1fef9a215dbd0ff674f5adf4c094204edebc4ec2130c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864233
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 97c1ded3f5c449382679745c8f8f8206c3a21a68d525bf7cf0eb5139c06db83f
Median time: 1701864232
Difficulty: 4.656542373906925e-10
Confirmations: 1706
Chainwork: 0000000000000000000000000000000000000000000000000000000000000436
Bits: 207fffff