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: 873
Hash: 0f897afb31e7233aeabcb361a50a6487a4fee2725aebf1141af0a9be68f3208d
Previous block: 0412f75e59938c1b48758800f349b3688e1309cf0c3d2e6dbf3e63348a7d446c
Next block: 48cb388249c59d5393d510368e30799682407469beff6ebf37a72f55623270e8
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1707857814
Stripped size: 218
Size: 254
Nonce: 0
Merkle root: dc72580957f18efc372a34aba06141ac8d2def6989fb9df1b5d71f25acadd2c1
Median time: 1707857813
Difficulty: 4.656542373906925e-10
Confirmations: 1371
Chainwork: 00000000000000000000000000000000000000000000000000000000000006d4
Bits: 207fffff