Hello,
1. If you check your domain in the https static checker, all 4 variations of your domain is forwarded to an https version which is correct:

2. As for your robots.txt file, could you please confirm what you meant by “upload”? Did you create a physical robots.txt file and uploaded it into your website directory? Rank Math has a feature to virtually generate robots.txt files and you can edit the file under the Rank Math settings. If you have a physical robots.txt file in your website directory, please delete it and follow the robost.txt configuration, my colleague provided in the previous reply.
3. As for the sitemap, please follow the steps below:
3.1. Flush the Sitemap cache by following this video screencast:
https://i.rankmath.com/xXXhDt
3.2. Exclude the Sitemap files of the Rank Math plugin in your caching plugin. The cache could be via a plugin or from the server:
https://rankmath.com/kb/exclude-sitemaps-from-caching/
3.3. Remove all your sitemaps from your GSC and resubmit only the primary sitemap (sitemap_index.xml).
3.4. If the issue still persists, please add this filter in your active theme’s functions.php file:
add_filter( 'rank_math/sitemap/enable_caching', '__return_false');
Please follow this guide to implement the filter code I just shared: https://rankmath.com/kb/wordpress-hooks-actions-filters/
After that, please follow step 3.3 again.
4. Lastly, for your Analytics issue, please reconnect the Analytics account again, to regenerate a new auth token from Google, by going to WordPress Dashboard > Rank Math > General Settings > Analytics and configure the Analytics settings:

Ensure all permissions are accepted and all checkboxes are ticked: https://rankmath.com/kb/connect-your-google-account/
After that, please follow this guide: https://rankmath.com/kb/delete-old-analytics-data/
This may take a couple of minutes to fetch the data from Google.
If the issue persists, please do let us know and we will further troubleshoot this for you.