Dynamically added modals aren't triggering - html

Question

I am loading cards and there modals dynamically and the problem I am facing is that the dynamically added cards aren't triggering the dynamically added modals.
The cards are this
data.forEach(eve => {
console.log(eve.data());
event = eve.data();
pastEventCards+=`
<li class="cards_item">
<div class="card">
<div class="card_image">
<img src="images/posters/cpp_2021.jpeg" />
</div>
<div class="card_content card-body d-flex flex-column">
<h2 class="card_title">${event.title}</h2>
<p class="card_text">
</p>
**<button data-modal-trigger="past-event-modal-${event.eventNo}" class="mt-auto demo__btn demo__btn--secondary">
Read More
</button>**
</div>
</div>
</li>
`
pastEventModals+=`
<div class="modal" data-modal-name="past-event-modal-${event.eventNo}">
<div class="modal__dialog">
<button class="modal__close" data-modal-dismiss>×</button>
<header class="modal__header">
<h2 class="modal__title">${event.title}</h2>
</header>
<div class="modal__content">
<h4 class="modal_description">Description</h4>
</p>
<p>${event.description}</p>
<p class="modal_description">
${event.date}
</p>
<p class="modal_description">Attendees : ${event.attendee}
</p>
<p>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-modal-dismiss>Close</button>
</div>
</div>
</div>
`
});
cardsList.innerHTML = pastEventCards ;
modalList.innerHTML = pastEventModals ;
I have tried referring to other stack overflow questions related to this and couldnt find a understandable solution to why this is happening , can anyone tell why the buttons cant trigger the modals ?
**EDIT :: **
The button that triggers the modal is inside this ** ** in the pastEventCards variable and the modal is in pastEventModals and when i use "data-modal-trigger = "something" " it will trigger the modal with modal name "something" right ? So y isnt it happening. If I dont add this modals and trigger cards dynamically and add it in the html template then it works fine but after adding dynamically it doesnt work