Expected behavior

I'm testing MDB with a Struts 6.3 project to verify if we can use it for further development. I'm trying to make a form with input groups for a text area and a select, but I'm having some issues with sizing. My goal is to have a multiline textarea with an asterisk behind it to indicate it's required, and below that a select with a same required indicator that fillls the entire width of the form.

Actual behavior

The problem I have is that the required indicator for the text area shows below the text area if I don't put it in an input group, and the text area doesn't have enough height for multiline display if I do put it in an input group. And no matter where I try to put the w-100, the select won't grow to fill the available space.

Resources (screenshots, code snippets etc.)

<div class="row mb-3">
    <label for="textFieldBasic" class="col-lg-3 col-form-label">basic
        textfield</label>
    <div class="col-lg-9">
        <div class="input-group">
            <s:textfield type="text" theme="simple" id="textFieldBasic"
                cssClass="form-control" cssErrorClass="is-invalid"></s:textfield>
            <span
                class="input-group-text border-0 c-table-basic__required">*</span>
        </div>
    </div>
</div>

<div class="row mb-3">
    <label for="textareaBasic" class="col-lg-3 col-form-label">Basic
        text area</label>
    <div class="col-lg-9">
            <s:textarea id="textareaBasic" theme="simple"
                cssClass="form-control" cssErrorClass="is-invalid" />
            <span
                class="c-table-basic__required">*</span>
    </div>
</div>




<%--                    'LevelOid' Select --%>
<div class="row mb-3">
    <label for="textareaBasic" class="col-lg-3 col-form-label">Basic
        Select</label>
    <div class="col-lg-9">
        <div class="input-group w-100">
            <s:select id="textareaBasic" data-mdb-select-init="" theme="simple" list="selectOptions" listKey="id" listValue="name" />
            <span
                class="input-group-text border-0 c-table-basic__required">*</span>
        </div>
    </div>
</div>