@page "/"
<ModalPage @ref="_modal">
<Title>Some title</Title>
<Body>
<div class="row">
<div class="col">some number</div>
<div class="col">123</div>
</div>
</Body>
</ModalPage>
<button @onclick="() => _modal.Open()">Show modal</button>
@code {
private ModalPage _modal;
}