This is a detailed trial and tested way for the browser cookies option for the Chrome browser. I may need to try it.

If your statement is true, options 1 and 2 are useless, and we may need to report to Chrome Devs.

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Chrome SAYS it allows you to do manage this automatic removal of a site’s cookies in two ways (still using the hypothetical XYZ website):
Option 1-On the XYZ website, click the lock icon to the left of the URL>click “Cookies”> in the list of cookies, click every one and click “Block” and “Remove” when all are blocked and removed, click “Done.” Click the refresh button. You may notice you now see a blank website. Click the lock icon again >Cookies>and the word at the top “Blocked.” Click each cookie and at the bottom don’t click “allow,” click “Clear on Exit”. After you’ve done this for all of them click Done. Click the refresh button. The site will add the cookies back and you can now see the site.
Option 2-Go to Settings>Privacy and Security>Cookies and Site Data>Customized Behaviors>Always clear cookies when windows are closed>Add. You can add their URLs in several ways: exactly as the example shows, with or without the http, https, www … the system will tell you if this is not a valid website. For example [*.]xyz.com; [*.}www.xyz.com. With this option, when you visit XYZ you will see their site and they will add cookies.

With either option 1 or 2, you now want to test and see if Chrome really does what it promises. You close the XYZ tab, close the entire window, and even close all windows and the browser. You go to Settings>Privacy/Security>Site data>See all cookies>scroll down to XYZ … and lo and behold THEIR COOKIES ARE STILL THERE.

Although I believe there “may” be some sites the Chrome option works, several I’ve tested, using both methods above, and writing the URL in different ways (you can put duplicates on the list), most of the time it is as if there were no such option at all. You must in the Cookies and Site data>See all cookies, go in and manually remove them yourself.

[NOTE: There is a third Chrome cookie option which I would never use … you can, in Settings>Privacy/Security>Cookies and other site data> toggle the “Clear cookies and site data when you close all windows.” This of course will clear all the cookies you have and lock you out of websites. Some use that option — through experience, I do not.]

This issue of Chrome removing — or NOT removing — specific site cookies automatically seems to be of little concern. I could find only one thread about it that someone said this was a “bug” that has been reported to Chromium and supposedly “fixed,” but the postings there are over a year old and today the “bug” still exists. I guess the general lack of interest in the issue has caused the developers to move on to other things. The only way to get this feature working — if it is possible to do so — is for more people to report it to the Chrome developers. You can google how to do this.