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: 303
Hash: 0e7afe9855b32908240cbfa47f2199f3c38161c9d0798e6f31d28c4fe430223c
Previous block: 26db9c694282a46f4a8438ea9d80dfd17b3b0569729561b2fc217c108a38fb63
Next block: 6b3dce9d93cead027b3730a51d8ba3ef417908f9b0f4a18df6dd866efb1f231a
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597918
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: f2c76f207eb913c2786869f3fb41ce383dc6fece476d0ad25e5d26ce6dec044e
Median time: 1701597917
Difficulty: 4.656542373906925e-10
Confirmations: 1941
Chainwork: 0000000000000000000000000000000000000000000000000000000000000260
Bits: 207fffff