may 2020 algo

Lately serp has been really weird this day and we know it because May Core update because some of the site i've working always high in traffic and after may 5 exactly it just go down to almost no impression. But i don't want to blame but instead i want to share a little bit about my trouble...

lots of my posts despite being crawled Google has refused to index them. I know others had similar issue following the May update. How have you fixed it? How were you able to?

May 2020 update; initial thoughts after the first 10 days. After 10 days of checking sites, monitoring competitors and giving the latest algo time to kick in, this is just a quick summary of what I've found. I've bounced these ideas off @WebMinati too, and as he agrees these are just thoughts...