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: 690
Hash: 67c86ebbe5954ceb5d84fd8e7ceb11b0fce40848cd3f05f33f8201103f0b03f7
Previous block: 6ed8e4049dde45170a91c1c470ecb87d90159ef64a4f64d5e2b1ca846d5a8845
Next block: 28c9d3170344edc8cd103586405d3103b5f5895978927a5b524483bdf79c843d
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864258
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: 57306cb09a4e1f891c0e74bcc51102bebd749ad2783942141db10d17d35b2cf3
Median time: 1701864258
Difficulty: 4.656542373906925e-10
Confirmations: 1554
Chainwork: 0000000000000000000000000000000000000000000000000000000000000566
Bits: 207fffff