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: 239
Hash: 43ef756940aaaf8f8a3d34ecb1e9456c9f51a88b8ae9b3aa58625928ae37d6bd
Previous block: 73cf1847f8e0a64a9751448e66a2204d64e585ad7b8dee45723e95a0a6d9f8b6
Next block: 607b6f6d69ebecd364b5806b586484ee65d0c649942f18ff2e3f3e1fad894eba
Weight: 872
Versionhex: 30000003
Version: 805306371
Transactions:
Time: 1701597907
Stripped size: 218
Size: 218
Nonce: 0
Merkle root: 45ade678e3abfc3c72fc4db819938be42b2d0e24a8ecdef3d72d201094ac65e0
Median time: 1701597906
Difficulty: 4.656542373906925e-10
Confirmations: 2005
Chainwork: 00000000000000000000000000000000000000000000000000000000000001e0
Bits: 207fffff