In a service provider's boot() method:

Filament::registerRenderHook(
    name: 'scripts.start',
    callback: fn () => new HtmlString(html: "
        <script>
            document.addEventListener('DOMContentLoaded', function(){
               setTimeout(() => {
                    const activeSidebarItem = document.querySelector('.filament-sidebar-item-active');
                    const sidebarWrapper = document.querySelector('.filament-sidebar-nav')
 
                    sidebarWrapper.style.scrollBehavior = 'smooth';
 
                    sidebarWrapper.scrollTo(0, activeSidebarItem.offsetTop - 250)
               }, 300)
            });
        </script>
"));

#2nd Way

Filament::registerRenderHook(
    name: 'scripts.start',
    callback: fn () => new HtmlString(html: "
        <script>
            document.addEventListener('DOMContentLoaded', function(){
               let sidebar_item = document.querySelector('.filament-sidebar-item-active');
                       if( sidebar_item ) {
                            sidebar_item.scrollIntoView({ behavior: \"auto\", block: \"center\", inline: \"center\" });
                       }
            });
        </script>
"));