.buttonGroup {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.25rem;
}

// ラジオボタンを非表示
.buttonGroup button[type="button"] {
    display: none;
}

// labelをボタン化
.buttonGroup button[type="button"]+label {
    width: 100px;
    color: #fff;
    background-color: #888;
    border: solid 1px #888;
    text-align: center;
    cursor: pointer;
    border-radius: 4px;
    box-sizing: border-box;
    padding: 10px;
}

// チェックが入っているbuttonの次の要素のlabel
.buttonGroup button[type="button"][data-state="checked"]+label {
    background: #fff;
    color: #888;
    border-color: #888;
}

<RadioGroup
    className={buttonGroupStyles.buttonGroup}
    defaultValue="orange"
    onValueChange={changeValue}
>
    <RadioGroupItem value="apple" id="apple" /><Label htmlFor="apple">Apple</Label>
    <RadioGroupItem value="orange" id="orange" /><Label htmlFor="orange">Orange</Label>
    <RadioGroupItem value="peach" id="peach" /><Label htmlFor="pieach">Peach</Label>
</RadioGroup >