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: 635
Hash: 68fec1b1d29021a88d4ba825fb71aa7161877fae5b8a40d022bcd7c5f440a26a
Previous block: 5e5bee6fe5ca679a1188a5c4755f6882ff836ea85ee6604d6834d7422a5cc528
Next block: 27d8c3a7c13173eebe88da04220c2ed1d3194fc17a48b0eac612cc16a58c834c
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864249
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 40e63fd92ec8ec14898385514ef850b37498b10c1eb2ea7a34f3801a9b96b612
Median time: 1701864248
Difficulty: 4.656542373906925e-10
Confirmations: 1609
Chainwork: 00000000000000000000000000000000000000000000000000000000000004f8
Bits: 207fffff