Trulala,
<!DOCTYPE HTML>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
</head>
<body>
<div class="styled__SelectStyled-sc-15n6gx6-0 HHVbn uikit-select">
<div class="styled__SelectInputBox-sc-15n6gx6-1 htxrpz uikit-select_box">
<div class="styled__SelectInputValue-sc-15n6gx6-4 htsPlN"><span class="styled__SelectInputSearch-sc-15n6gx6-2 bOjFHH"><input autocomplete="off" readonly="" placeholder="Выберите шаблон" class="styled__SelectInput-sc-15n6gx6-5 onyxk" value=""></span><span title="" class="styled__SelectInputItem-sc-15n6gx6-3 RkdSN uikit-select-inputItem"></span></div>
<div class="styled__ControlIconStyled-sc-r7tvgm-0 icGPJJ uikit-flatList_control-icon"><svg width="24" height="24" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"></svg></div>
</div>
<div tabindex="-1" role="list" class="styled__SelectList-sc-15n6gx6-6 creHhJ uikit-select_list">
<div data-label="текст какой-то" data-value="230697" data-disabled="false" class="styled__SelectListItem-sc-15n6gx6-7 kOyKQH select-dropdown-option" role="option"><span>текст какой-то</span></div>
<div data-label="Завтра могу сделать." data-value="102846" data-disabled="false" class="styled__SelectListItem-sc-15n6gx6-7 gAohFE select-dropdown-option" role="option"><span>Завтра могу сделать.</span></div>
<div data-label="текст какой-то" data-value="15439" data-disabled="false" class="styled__SelectListItem-sc-15n6gx6-7 gAohFE select-dropdown-option" role="option"><span>текст какой-то</span></div>
<div data-label="текст какой-то" data-value="76256" data-disabled="false" class="styled__SelectListItem-sc-15n6gx6-7 gAohFE select-dropdown-option" role="option"><span>текст какой-то</span></div>
<div data-label="текст какой-то" data-value="15296" data-disabled="false" class="styled__SelectListItem-sc-15n6gx6-7 gAohFE select-dropdown-option" role="option"><span>текст какой-то</span></div>
<div data-label="текст какой-то" data-value="230702" data-disabled="false" class="styled__SelectListItem-sc-15n6gx6-7 gAohFE select-dropdown-option" role="option"><span>текст какой-то</span></div>
<div data-label="текст какой-то" data-value="256641" data-disabled="false" class="styled__SelectListItem-sc-15n6gx6-7 gAohFE select-dropdown-option" role="option"><span>текст какой-то</span></div>
<div data-label="текст какой-то" data-value="106421" data-disabled="false" class="styled__SelectListItem-sc-15n6gx6-7 gAohFE select-dropdown-option" role="option"><span>текст какой-то</span></div>
</div>
</div>
<script>
function findElementByTagAndText(tag, text) {
console.log('tag = ' + tag);
console.log('text = ' + text);
let elem = document.querySelectorAll(tag); //собираем все элементы span в nodelist
let pattern = new RegExp(text, "i");
let elem2 = Array.from(elem).filter(e => pattern.test(e.textContent));
console.log('list of span array = ' + elem2.length);
return elem2[0];
}
let tag = 'span'
let text = 'текст какой-то'
findElementByTagAndText(tag, text);
/* tag = span
text = текст какой-то
list of span array = 7*/
</script>
</body>
</html>