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Hey there! Don't get too hung up on backlinks appearing (or not) there can be a few reasons for this. Don't forget crawling the web takes a lot of power and Roger can only get so far and so often, Google has a bit more power to get further so it's likely to find links more often and faster than other crawlers. Do they might be there and not visible on a tool. Secondly, if the value of a backlink is there e.g. the value to a user that is the complete purpose of a backlink more so than anything else. Keep on working and you might find them come up over time, you can always look in Search engine console and you might discover them in there too! The link you gave unfortunately 404s so as long as all your links are working I'm sure it will be a ok, you can always keep a list somewhere of them to manually check. it can take weeks depending on the DA/PA of the site. Hope some of that puts your mind at ease and keep on creating links and you'll get there before you know it edit  I'd also ensure you've ticked all boxes on your site, check if its https

You can use the Web Console in Firefox to see the URL load speed. According to the screenshot attached there is no delay resolving the DNS and connecting to your website. However, there is huge delay of >5s waiting for the response. So, something must be wrong on the server side. I'd recommend checking the server logs (or the Nginx cache logs because there seem to be a cache). Notice that this delay has nothing to do with the page size or contents. That's why following the steps to optimize the contents didn't help. Yled56G