Hello Try to put unique and original urls in the sitemap If some urls are not in the sitemap, it will be indexed again. But keep in mind that if these urls are of poor quality over time, Google will not index them. And most of these types of urls are created automatically or are site filters Note: should be further investigated and what type of urls you have. Thankful

Hello You can rewrite titles and h1s.

Make sure the h1 tag and title tag are not the same

Hello Check to see if your site's server or host is down or check out Google Crawl Budget when checking the site for no error But this problem of yours is not accurate You need to explain more.