What had been the earliest non-signature-gated Taproot script-path spends simply after activation (block 709635)

Shortly after Taproot activation (709632), script-path spends seem with trivial leaves akin to naked OP_1. For instance, transaction https://mempool.area/zh/tx/445f592c71e364670ecf8d168eb651319d1fc17527df7addd35aa09555733cd6

• Questions: (1) What had been the earliest such non-signature-gated spends, and (2) who deployed them (checks / experiments) and to what finish?

Supply hyperlink