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: 472
Hash: 543e566ed5a97b6e9d6c81779988cd6c79a986f61ae3f2a35dbb1402f6786c4f
Previous block: 637104cca9d928f919a4ff2d4b457a37f91758ce4a0f20707def5497e1e5e1b2
Next block: 407ac4497a2ab06db3c33a01ab98b7fc3c0e404df66d0637bd7110b2ce1c9a5e
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864222
Stripped size: 218
Size: 254
Nonce: 2
Merkle root: 34a39406d5036abaabda8e5225f95bb2b24a6a8746426c29ba5735ba3931ddd1
Median time: 1701864221
Difficulty: 4.656542373906925e-10
Confirmations: 1772
Chainwork: 00000000000000000000000000000000000000000000000000000000000003b2
Bits: 207fffff