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: 347
Hash: 07d47722959d6d423a74d7b43568043bcb5d706481b4300ab77b65e9d7434d59
Previous block: 7542190158a05c9d622d85642288a96cf909f11da7cd9fc2bc7cb428484964a2
Next block: 260b4ef39358b37826cc0020120faaf085fcb0ca090dc3d49dcd2c0b57a03f13
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597925
Stripped size: 218
Size: 218
Nonce: 1
Merkle root: 5726d9d2b519143413adf0ea67c4b3d9a0355bb9e143b3f23158c801e4c2cc1f
Median time: 1701597924
Difficulty: 4.656542373906925e-10
Confirmations: 1897
Chainwork: 00000000000000000000000000000000000000000000000000000000000002b8
Bits: 207fffff