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: 503
Hash: 2860ea563b4945871c26df4311ef514cb4de89eb75552e4c38efd27af0172d79
Previous block: 7fab41bba0a1728f6012d797a71fa4c5fbc4607f6f4219c72189d2f8c72ebc0b
Next block: 0698d6fbcfea2dc95ba498437955df29365844632c2675433f378f540e6431d7
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1701864227
Stripped size: 218
Size: 254
Nonce: 3
Merkle root: 2efd6b1b0de14404777efca0eb72cc5e16a104b7a7daa9731ae2b280d904c448
Median time: 1701864226
Difficulty: 4.656542373906925e-10
Confirmations: 1741
Chainwork: 00000000000000000000000000000000000000000000000000000000000003f0
Bits: 207fffff