Hello
you will need to make some changes for this.
First you will need to hide the slider using additional css.
go to dashboard >> appearance >> theme editor >> on the right side you will see the files and folders of the theme
>> expand the folder template-parts >> scroll down a little to find the file section-slider.php and click on it to open its code >> and on the end of the line you can paste your widget or shortcode of your slider >> click on save changes
Thank you