404s in GSC report

GSC keeps reporting 404 with https://mydomain.com/bidata/
I had /bidata/ sub-folder long time ago, but it's removed more than 2 years already.

I have double checked in all sitemaps, all the links there are working. No internal link to /bidata/ URL, even checked in the database.
Have used removing function in GSC for deleting all URLs starting with https://mydomain.com/bidata/ The status is Deleted.

Any idea why GSC keeps reporting 404s with those URLs?

Google might still have cached versions of the URLs. It can take some time for Google to completely remove these URLs from its index. You can use the URL Inspection Tool in Google Search Console to request indexing of your site’s updated pages and check if Google has updated its index.

Make sure that you have proper 301 redirects set up for the /bidata/ URL if it was moved or renamed. This helps both users and search engines find the correct page and can prevent 404 errors.
also If you’re using a CDN, check if there are any cached versions or references to the old URL. Sometimes CDNs might still serve cached content even after changes are made on the server.
If it is still not resolve, it might be worth waiting a bit longer as Google’s indexing process can sometimes be slow.

Google might still be holding onto old cached versions of your /bidata/ URLs, which can take some time to clear out completely. Even though you've removed the folder and deleted the URLs in Search Console, there could still be external links or cached content from a CDN pointing to those old URLs. Setting up 301 redirects can help guide users and search engines to the right page. You can also use the URL Inspection Tool in Search Console to update its index. If it’s still an issue, it might just need a little more time to resolve.