Is your site new? If yes, could be you're still in Google sandbox. You can submit the links manually. To do that: On your search console, use the 'check link' feature. Copy and paste the link you want Google to crawl and index. Submit the link. If it is already crawled and index, you will be notified. Or prompted to submit the link for crawling. It takes about 24hours for Googlebots to crawl and index those pages.