Since GA4 it is not possible because the GA account is managed by Google. You don't have admin permissions so you can't link the GA account with an Ads account. For that reason, on the GA page to link it to an Ads account, the "Link" button is disabled.

One strategy to still track the ads conversion without using GA4 is: "drive traffic to your landing page, and after installing the extension, open the welcome page on the same domain with the same analytics counter. Actually, this is a good solution. All of our experiments show that funneling through our site is more effective than sending traffic directly to a Chrome store page."

You can see this link for more discussion, including the comment of "Uladzimir Yankovich" who originally proposed this strategy