XF 2.1 Conditional statement in xf:option tag?

[NicolasZN]

An add-on I'm working on has the following lines in it:

                <div class="block-body">
                    <xf:radiorow name="username">
               
                        <xf:foreach loop="$subAccounts" value="$user">
                            <xf:option value="{$user.username}" selected="{{ $username == $user.username }}">
                                {$user.username}
                                <xf:if is="{$user.conversations_unread}">
                                    <i class="far fa-envelope"></i>
                                    <span class="badgeContainer{{ $user.conversations_unread ? ' badgeContainer--highlighted' : '' }}"
                                    data-badge="{{ $user.conversations_unread ? $user.conversations_unread|number : 0 }}" title="{{ phrase('conversations') }}">
                                    </span>
                                </xf:if>
                                <xf:if is="{$user.alerts_unread}" />
                                    <i class="far fa-bell"></i>
                                    <span class="badgeContainer{{ $user.alerts_unread ? ' badgeContainer--highlighted' : '' }}"
                                    data-badge="{{ $user.alerts_unread ? $user.alerts_unread|number : 0 }}" title="{{ phrase('alerts') }}">
                                    </span>
                                </xf:if>
                            </xf:option>
                        </xf:foreach>
                   
                    </xf:radiorow>
                </div>

The xf:if statement I just added to try to hide the font awesome icons if there aren't unread alerts/conversations.
However, as a result, whenever I try to rebuild the add-on I'm receiving:

Option tag contains an unexpected child element. - Template name: public:template_name_here

I know it's the xf:if statement, but am wondering if there's any way I can achieve what I'm trying to achieve with an acceptable child element?

 

[NicolasZN]

Could somebody let me know how to include conditional content within an option tag?

 

[NicolasZN]

Any guidance at all would be appreciated.
I can't find any documentation on the xenforo syntax and the option tag, let alone any which suggests conditional statements are disallowed within an option tag.
Is there something else incorrect in the code posted above?

 

[NicolasZN]

I can't find any documentation on the xenforo syntax and the option tag, let alone any which suggests conditional statements are disallowed within an option tag.

Still haven't been able to locate anything about this.
Is it possible to have conditional formatting in an option tag?