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: 323
Hash: 2fcfefd237d212cdd82ead0da5bb0275d9eed8419be0fdc954983419ef336027
Previous block: 3a6dc270f35086fa1ff414aeabca25cb72cf586df1c6f6bae85c54362a6abff7
Next block: 5296c4582496764cb0ae300eb09a24325a47f3c3c3e4fdfcebbeb84045359f6d
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597921
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: e73a816bf44117a75908f8b35f302500ae21e0fc42453c82a78a3b9e63df26b2
Median time: 1701597920
Difficulty: 4.656542373906925e-10
Confirmations: 1921
Chainwork: 0000000000000000000000000000000000000000000000000000000000000288
Bits: 207fffff