If you're looking for a plugin to create and manage XML sitemaps for search engines, AIOSEO is a great option. The all-purpose WordPress plugin has a module called Smart XML Sitemaps that can help you get your site indexed and improve your search engine ranking. AIOSEO has a lot of other SEO tools, too, so it's a good option for businesspeople, bloggers and developers who want to improve their website's SEO without programming.
Another good option is Yoast, a popular SEO optimization tool that offers a WordPress plugin. Although it doesn't specifically mention XML sitemaps, it's got a lot of other SEO abilities, like automating SEO tasks, optimizing content for search engines and readers, and suggesting internal links. That makes it a good option for small businesses and webshops trying to improve their search engine placement.
For people who want to focus on bulk indexing, Tag Parrot has a one-click bulk indexing option and auto-syncing of sitemaps from Google Search Console. It's designed to speed up the SEO process by making it easier and faster to get website pages indexed. The tool works on a variety of platforms, including Wix, Gatsby, Shopify and WordPress, so it's a good option for people with different types of websites.