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: 217
Hash: 7a5d837f32fbb149cf09e1fb28914c58adf0cfc3681e4e450b2c6773ffb6a366
Previous block: 0ad584fc3ce887bceadaa68759d0116278ce6a1c221d95a3e9a0474ecb3223ff
Next block: 1a695856d4b63b8614c7e50a7c6ebcbc25c228385a2269aacb4b69f58e69caba
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597903
Stripped size: 218
Size: 218
Nonce: 2
Merkle root: c70bf2a2c598ac1deabb81bb85d7609b600eeb70c53b3f87ee0619da32234727
Median time: 1701597903
Difficulty: 4.656542373906925e-10
Confirmations: 2027
Chainwork: 00000000000000000000000000000000000000000000000000000000000001b4
Bits: 207fffff