Some people are not aware that search snippets and meta descriptions are not the same thing.
The descriptions that Google displays for your webpages are known as search snippets. It could be the meta description you wrote, or something entirely else. This is under Google’s authority.
You have control over the meta description, which is an HTML tag. You can write your own meta descriptions and optimise them.
What makes you think Google won’t use your meta description? Google may generate a description for your webpage that is completely different from the meta description you wrote, depending on the search query.
This isn’t a new concept. This technique was automated by Google many years ago.
The distinction between meta descriptions and search snippets is crucial, especially when Google makes announcements, such as when the length of search snippets was increased (only to shorten snippets a little while later).