Upload ads.txt file / Airtable Collection ID for Sitemap / Load More Button

So the title pretty much says it all, how can I upload google’s ads.txt into website root folder, how can I obtain Airtable’s CMS Collection ID, and is there any configuration for a “load more” (e.g. load the blog wrapper 20 items at a time), or add a paginate for specific pages (like website.com/page | website.com/page/2 etc)?

Thank you, and keep up the good work.