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: 437
Hash: 317bc5ae1de2b1e15711e2356ae27c8fc1b6bacc7878c2c8d99911ff49934d7c
Previous block: 0eb4fbd160f1267014c0d9b5e19098751e4250ba6694f05e79b0294ac4df3e8c
Next block: 59de32f08e9701c11c952773c8b7596e1325103c25a3e1553baca4c118184e6b
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864216
Stripped size: 218
Size: 254
Nonce: 7
Merkle root: f5b9457870acabf73a4fb1ac263390edbd526bd16f5020bb0faf8bf19b5943cc
Median time: 1701864215
Difficulty: 4.656542373906925e-10
Confirmations: 1807
Chainwork: 000000000000000000000000000000000000000000000000000000000000036c
Bits: 207fffff