Crawling and searching in multiple lines of text type site column

Hello,

I've created a site column called "Long_Description", which is a multiple lines of text field. I'm using this site column in a list and in a document library, and altough they have content and I'm reindexing them, the column doesn't show in the crawled properties in SharePoint Search Admin Center (and I even waited for 24h).

Is it possible to crawl a multiple lines of text site column in SharePoint Online?

Thanks in advance.

Ferran