You can’t re-index a whole a site – you get 25 crawls but if your sitemap publishes the Lastmod date, Google will most likely refresh it. And if you’re not, you should.
Doing site audits and CWV’s means your thinking in SEO at a macro level. SEO is a PAGE level system. Like – checking your page titles for being “too long” is just silly. If you change your page title, depending on what you change, you could end up moving indices and killing any traffic or growth in raknig toward traffic. Similalry, if you have pages with too many keywords in the URL and they aren’t getting clicks, thinking that a new design or page speed is going to put them in different indices is false hope.
So
1. DO NOT CHANGE URLS or Page titles – any ascii character change, space, letter, capitalization change = a NEW URL
2. Authoirty Shaping: Map your 50 new pages – are they all in the same tier or subfolders?
2.1 Do not expect Google to index orphan pages – make sure you get backlinks to parent pages in each tier
3. Check your URLs for page with no clicks and re-think how you’re publishing, linking and titling these documents