executing html code through xsl param in xml - html

Question

I'm trying to pass some html tags as the value of my xsl:param name="messageBody" to get executed before generating my template. But instead of executing the html code, they are displayed as text.
This is when I am generating a template with the WSO2 ESB. Once used xsl:value-of select="$messageBody" but displayed the html text instead of executing and the same for xsl:copy-of select="$messageBody"
Below is code fragment that which include the value of that xsl:param name="messageBody"
<table border="0" cellpadding="8px" cellspacing="10" style= "width:100%;border-bottom:1px solid rgb(255, 255, 255); color:#000000" align= "center">
<tbody>
<tr class="microservicerows">
<th>Target Account</th>
<th>Amount</th>
<th>Status</th>
<th>Remarks</th>
<th>Time</th>
</tr>
<xsl:copy-of select="$messageBody"/>
</tbody>
</table>
The expected output should be displaying new table rows under the header tags but instead the it's just plain text once my template is generated.
The value of the xsl:param name="messageBody" is below
<tr class="microservicerows">
<td>1000029061</td>
<td>55,000.00</td>
<td>Unsuccessful</td>
<td>My target</td>
<td>02/09/2019</td>
</tr>
<tr class="microservicerows">
<td>1000029078</td>
<td>900.00</td>
<td>Successful</td>
<td>Start later</td>
<td>03/09/2019</td>
</tr>]