WP-Cron is not a cron job. It runs on visitor page requests, so a page cache and a CDN can silently stop your scheduled posts, backups and WooCommerce renewals. How to fix it properly, in the right order.
An XML sitemap hands search engines a list of your pages. It takes minutes to set up, it is easy to break silently, and on a shop with a deep catalogue it is the difference between pages being found and ignored.
If some visitors see your new server and others still land on the old one, this is why. Lowering TTL fixes it, but only if you do it a day in advance.
Most VPN marketing is built on a public Wi-Fi threat that near-universal HTTPS has largely removed. The genuine reasons to run one are less exciting and more useful, starting with a fixed IP address.