.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 >