How to enable external sites to retrieve thumbnails using the RSS functionality in Concrete CMS 9.4.8

Thank you for your continued guidance.
Is there a way to ensure that thumbnails are reliably retrieved on the blog aggregation site “Nihon Blog Mura” when using the RSS function in ConcreteCMS 9.4.8?
Currently, the settings are done via “Dashboard” > “Pages & Themes” > “RSS Feeds”.
Currently, the article titles and articles are displayed on the aggregation site, but the thumbnails are not retrieved or displayed.
If anyone has expertise in this matter, I would appreciate your advice.

Just a quick follow-up: I have already set up the article page images and thumbnails, and they are displaying correctly in ConcreteCMS.

I have done some research on my own, but I was told to check whether the og:image tag appears in the source code of the top page.
I understand that an OGP image tag is required; how do I go about setting this up?
Thank you in advance.

It looks like Open Graph Tags Lite solved the issue.
Thank you very much.