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. mupBAc74k

Height: 1554
Hash: 27ee61189bcdd0c4d9ce9f0da78255d136c740eb2efc73e6b807ae45ee44ae47
Previous block: 58ec8a32dc5ef014901dd26ea9c755bdf8a2c010eeed1608dbe716a0ff0fa13a
Next block: 07471e41b7cb21524f81b0f0609a3939950bbc427452bae9743334192177bb3f
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1708932128
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 0329d8ee8934cef0812fe76d78673aa35cf4516fc4c72e579b42ac2a4e97113a
Median time: 1708932128
Difficulty: 4.656542373906925e-10
Confirmations: 55
Chainwork: 0000000000000000000000000000000000000000000000000000000000000c26
Bits: 207fffff