A really helpful Search Console insight was shared in the July 16 episode of Search off the Record. It's at 17:49 in the video if you want to skip straight to it and here's the gist:

• The "Validate Fix" button (found on Page indexing reports) is a mass recheck acelerator
• You should only click the Validate Fix button after you've corrected a genuine sitewide issue
• When you click it, Google tests a sample of the affected pages in the report
• If the sample comes back "fixed" it can trigger faster re-crawling of all the rest of the pages in the report
• If not, sad trombone
• If you have a single URL you worked on/fixed and want Google to check it out, use the Inspect tool to request re-indexing