I receive from google sheet some html tags to be displayed but it shows as raw string. here is how
Index.html
  <? var BlogData = getSheetData("Blogs"); ?>
  <? for(var i = 0; i < BlogData.length; i++) { ?>
        <div class="text-muted text-end"><?= BlogData[i][1] ?></div>
        <!-- BlogData[i][1] this should be dom but it displays as string -->
  <?};?>
code.gs
 function doGet(e) {
    return HtmlService.createTemplateFromFile('Index').evaluate();
 }
 function getSheetData(sheetName)  { 
    var ss= SpreadsheetApp.openById("1s5AHWsdfbsgfaegsdthwrthaert5ad4y4gt56355h");
    var dataSheet = ss.getSheetByName(sheetName); 
    var dataRange = dataSheet.getDataRange();
    var dataValues = dataRange.getValues();  
   return dataValues;
  }
and the value comes from sheet Blogs look like this
| A | B | 
|---|---|
| <h1>Title </h1>  | |
| <h2>Subtitle</h2>  | |
| <p>Paragraph</p>    | 
and unfortunately it displays in the Index.html as string
I need to show it as DOM not as string
 
                        


finally, I found the solution.
using google interpolation tags is a bit tricky and I don't know types of these tags. but accidently I found that solution.
using
<?= blogData[i][j] ?>will return html tags as it is.however,
<?!= blogData[i][j] ?>will return html format.using exclamation mark completely changes the result.