I usually scrape my followers number with the function importXml.
For followers number : =CNUM(REGEXEXTRACT(IMPORTXML(YOUR INSTA URL;"//meta[@name=‘description’]/@content");"(.{1,})(?: Followers)"))
The number of post should be easy too with this, but I don’t know how to scrape the number of like and comment from the last 20 post, I think you can with ImportXml but you have to try.
JarveePro can export CSV files. It is an Instagram automation tools, create ins accounts, scrape ins followers, get posts. Maybe you can check JarveePro site