Hi Nilesh,
First, you need to identify the theme of your application, the basic set of styles your application will take.
You can see on my example the Default Theme is Test1 which I can see on the folder Themes.

Now, I'm gonna double click the theme and paste the following CSS:
.table-scroll-wrapper {
overflow: auto;
border: var(--border-size-s) solid var(--color-neutral-4);
}
.table-scroll {
margin: 0px;
border: none;
}
.table-scroll thead th {
position: -webkit-sticky;
position: sticky;
top: 0;
}
.table-scroll tr td:first-child,
.table-scroll th:first-child {
position: -webkit-sticky;
position: sticky;
left: 0;
z-index: 2;
border-right: var(--border-size-s) solid var(--color-neutral-4);
}
.table-scroll tr td:last-child {
border-right: none;
}
.phone .table-scroll tr td,
.tablet .table-scroll tr td {
border-right: none;
}
.table-scroll *[data-expression] {
white-space: nowrap;
}

And now on the screen where we have a table, you will have to have a container with the table on it (on the screenshot left corner, you can see the container has a table inside) and this container will have the class table-scroll-wrapper:

And now on the Table I'm adding the table-scroll class:

And that's it.
Hope it helps.
Regards,
João