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.

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Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 252
Hash: 3b7467ddaef7f6913efd7160bb607b2491df84e7b7d2c0a4c570e23a7ba26c49
Previous block: 075de0811e58761e7cf93ac63ace415184dd30bbb48bc1e1b61404585b54739a
Next block: 4eaa79686196962a0886f2ad7a5b37e62fd3b78f7b47ab0e0dea5becbe7b734c
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597909
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 5c6b1b0dac388751c8577fb771196adca33938a7825e100db36dc9dc79bdcc68
Median time: 1701597908
Difficulty: 4.656542373906925e-10
Confirmations: 1992
Chainwork: 00000000000000000000000000000000000000000000000000000000000001fa
Bits: 207fffff