Hi,
You identified several issues. We have responded to them below.
1. SEO-Search Console
That field is empty in the plugin because Google killed the code we used to display the screen. This guide explains more: https://yoast.com/where-did-my-search-console-errors-go/
2.Name of Site Appearing in Title in Google
We looked at https://larnbd.com/?????-?????-????-????-???/ and we can see Yoast is outputting the right title. See image: https://pasteboard.co/IItVzk6.png.
Can you confirm if you use Inspect any URL that the issue is resolved? This will force Google to update the index. You may need to use it several times. This guide explains more:?https://kb.yoast.com/kb/fetch-as-googlebot/.
If the title still shows the site name, then Google is ignoring your title and adding its own. This guide explains more about why Google does that: https://kb.yoast.com/kb/google-shows-different-titles-for-my-site/#ignored