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: 625
Hash: 6738d6f556eba8d4ff007dd7500664f8185f0b0a77d90099fd1b81c72fe64e44
Previous block: 4eb361a881ad305c933ff856b3123037e169c1aab402a349f035f5eed1dbc187
Next block: 50adefcd858ce58994244210c7da42dcf3a874e467d314903b05c8a6251cd842
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864248
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: c806f86f1d2b78ab95f16cc7556e302eea733368452caf3818760c53563a6212
Median time: 1701864247
Difficulty: 4.656542373906925e-10
Confirmations: 1619
Chainwork: 00000000000000000000000000000000000000000000000000000000000004e4
Bits: 207fffff