Lots of confusion about the recommended 200 links per sitemap

Hey guys,

I just got very confused about the recommended 200 links per site map based on the rank math instructions and recommendations.
I switched to 200 from the 1000 and now I’m confused on what I should be submitting to Google. Currently, I have 246 posts on my website. Since I switched to 200, my default post site map (https://online4.love/post-sitemap.xml) is only showing 200. Where did the other 46 go? Also, I do see that there are two additional post-site maps that were created: https://online4.love/post-sitemap1.xml and https://online4.love/post-sitemap2.xml. Should I submit both of these site maps to search console? should I submit the index page https://online4.love/sitemap_index.xml to search console? There were not any clear instructions on this. Right now I have my old site map https://online4.love/post-sitemap.xml submitted and both the new pages 1 and 2 submitted to search console but that must be showing Google a lot of duplicates right? also, when I go over 400 posts, will I need to submit my third page? it was a lot more simple when it was just one post site map, but I followed the recommendations proudly set up guide and set it to 200. Please help with this as I am worried something is going to break.